Snorkeling, Freediving, and Scuba in Japan

Eastern China Sea

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Japan Sea

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North Pacific Ocean

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Philippine Sea

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Sea of Okhotsk

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Seto Naikai or Inland Sea

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Cold Temperate Northwest Pacific

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South Kuroshio

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Tropical Northwestern Pacific

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Warm Temperate Northwest Pacific

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Central Kuroshio Current

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East China Sea

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Northeastern Honshu

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Ogasawara Islands

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Oyashio Current

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Sea of Japan/East Sea

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Sea of Okhotsk

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South Kuroshio

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A Point

A Point is known for its seasonal congregation of hammerhead sharks, particularly from summer to fall. Divers can observe these sharks as they swim in schools, often circling around submerged roots or resting on rocky surfaces. This site is recognized as a significant habitat for various shark species, making it an important location for marine biodiversity. The entry to the dive site is from the shore, providing easy access for divers.

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Adan Shita

Adan Shita is located off the uninhabited Akenashiki Island in the Keramas, accessible via a 10-minute boat ride from Aka Island. The dive site features depths ranging from 7 to 20 meters and is characterized by mild currents, making it suitable for both novice divers and training sessions. Marine life includes clownfish, spiny dogfish, goatfish, and various nudibranchs such as Adeyakami and Fujinami. The underwater landscape is adorned with coral gardens, providing a rich habitat for diverse marine species.

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Agariushi

Agariushi, located south of Zamami Island, is characterized by its diverse marine life, including multiple species of clownfish and schools of snappers. The site features colonies of fire coral and is known for its rich diversity of anemonefish, with nearly all Japanese species present except for the red clownfish. The entry to this dive site is from the shore, making it accessible for divers looking to explore its underwater ecosystem.

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Ago Island

Ago Island, located in Onagawa, is a dive site suitable for beginners, featuring depths of 11 to 12 meters. The area is characterized by rugged reefs and narrow waterways, providing a unique underwater landscape. It is home to a variety of marine life, including pink dungfish, beaked sculpin, and true booyahs, which are present throughout the year. Additionally, the site experiences strong tidal currents that attract seasonal migratory fish, enhancing the biodiversity of the area.

38.4358, 141.4934

Aguni Fudensaki

Aguni Fudensaki is situated on Aguni Island, approximately 60 km northwest of Naha City, accessible by a 2-hour and 10-minute ferry ride. This dive site is renowned for its diverse marine life, including bigeye trevally, bluefin tuna, bluefin trevally, and schools of barracudas. Divers may also encounter larger species such as Napoleon and grey reef sharks. The underwater environment is enriched with unique creatures like giant frogfish, kudagombe, southern pufferfish, and clownfish, making it a vibrant spot for marine observation. The entry to the dive site is from the shore, providing easy access for divers.

26.5735, 127.2086

Akahae

Akahae is a dive site featuring clusters of soft and hard corals at a depth of around 20 meters. Divers may observe frogfish hiding in crevices, alongside schools of migratory fish. The site is home to a variety of marine species, including snappers, groupers, scorpionfish, yellowtail, turtles, and occasional sightings of sharks, rays, and flatfish. The presence of strong currents necessitates careful assessment of diving conditions. Although previous typhoons have impacted the hard corals, signs of recovery have been noted as of 2023, enhancing the site's appeal for divers.

32.9446, 132.4680

Akehama

Akehama is situated in the western region of Ehime Prefecture, characterized by a rias-style coastline and a sandy beach approximately 300 meters long. The site offers a diverse range of marine life, including macro species and larger migratory fish. Notable residents include dwarf damselfish, various nudibranchs such as blue, yellow, hero, and Fujii nudibranchs, along with tropical species like chubby damselfish, anchovy damselfish, pepperhead damselfish, minnow scorpionfish, and grouper YG. During the summer months, divers may also witness the spawning behavior of green squid.

33.3114, 132.4408

Aki no Hama

Aki no Hama is located on the largest of the Izu Islands, which is closest to the mainland. The island features Mihara, an active volcano at its center. While boat diving is an option, the site is primarily accessed via shore entry, with Autumn Beach being the most frequented access point. The underwater environment is rich in biodiversity, showcasing a variety of macro life including symbiotic gobies in sandy regions and nudibranchs among the rocky areas. During the summer months, divers may encounter white tip sharks, adding to the site's appeal for marine life observation.

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Akiu Great Falls

Akiu Great Falls is located approximately one hour from Sendai and features a unique diving experience in the basin of Akiu Ootaki, one of Japan's three largest waterfalls, with a vertical drop of 55 meters. Divers can experience the sensation of water vibrations throughout their body while exploring this freshwater environment. Marine life in this area is limited, but divers may encounter freshwater species such as char, rockfish, trout, white-tailed bream, and occasionally cherry salmon. Additionally, frogs and other terrestrial animals may be observed near the water's edge.

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Ama Beach

Ama Beach, located on the west side of Zamami Island, features a shallow sandy bottom with calm waters, making it suitable for beginners and families. The site is ideal for snorkeling and scuba diving, with a notable presence of green turtles. The surrounding coral reefs host a variety of tropical fish, including bigeye and lurid sparrowhawks, as well as blue-spotted trevally. The tranquil conditions and diverse marine life contribute to a pleasant diving experience.

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Ando no Hana

Ando no Hana features two buoys, one located in shallow waters and the other in deeper areas. The deep buoy is anchored in a sandy and muddy substrate, with depths exceeding 20 meters and a maximum depth of approximately 27 meters. Divers should maintain neutral buoyancy to avoid disturbing the sand. The site is accessible for diving from October onwards. Marine life includes various goby species, such as the threadfin goby and the threadfin lily goby, as well as frogfish that can be seen moving along the sandy bottom. To the west, a cleaning station is home to a colony of blue-spotted groupers. Other species observed in the area include western flying fish and razor fish. During winter months, schools of snappers can be spotted in the shallower regions.

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Antonio Gaudi

Antonio Gaudi is situated on the western side of Shimoji Island, adjacent to Irabu Island, approximately 5 km from Miyako Island. The site is characterized by numerous intricate arches formed by natural processes, resembling the architectural style of Antoni Gaudí. Divers can encounter a variety of marine life, including dark-loving species such as the pine crested sauna and hawksbill turtles. Other notable sightings include Japanese pygmy seahorses, violet sea otters, blue-and-white groupers, blue-and-white snappers, and occasionally, stingrays, manta rays, Napoleon fish, and green sea turtles. The entry to the site is from the shore.

24.8194, 125.1324

Aosango

Aosango is recognized for its significant Blue Coral, which spans an area approximately twice the size of a tennis court. The dive site features a variety of hard corals and offers depths ranging from 5 to 12 meters. Visibility at this location typically exceeds 30 meters, providing excellent conditions for divers. Marine life encounters include Hawksbill Turtles, Banded Sea Snakes, and schools of Yellowfin Goatfish and Striped Large-eye Bream, making it a notable spot on the East coast of Okinawa's main island.

26.3146, 128.0126

Arari

Arari is a shore dive site characterized by its dynamic underwater landscape, featuring notable formations such as the West Root and the Horse Mackerel Root. Located just 5 minutes from the harbor, it is accessible for divers who prefer not to use a boat. The site is particularly known for its stingray population, with encounters peaking during early summer, where divers may see multiple stingrays at once. As autumn approaches, visibility tends to improve, revealing a fascinating array of marine life, including kampachi and sunfish. Divers can also observe large schools of snappers that remain motionless in the offshore roots, creating a unique diving experience. The site offers excellent opportunities for both macro and wide-angle photography, with subjects ranging from seahorses to lionfish clinging to the walls, making each dive a chance for new discoveries.

34.8273, 138.7664

Ariga Cable

Ariga Cable is situated on the western side of Tokashiki Island. Divers can observe the underwater cable along the seafloor. The area is known for sightings of green sea turtles, scorpionfish, and various species of cardinalfish. The shallow regions boast vibrant coral formations. The maximum depth at this site reaches approximately 25 meters, making it suitable for divers ranging from beginners to those with intermediate experience.

26.2081, 127.3485

Atami

Atami is a notable dive site located in Higashi-Izu, accessible from Tokyo in approximately two hours. This shore entry site features a unique underwater landscape characterized by roots and wrecks, which are home to a variety of colorful luminal enteropods. Divers can also discover soft corals that host numerous macro-organisms, enhancing the visual experience. The site is particularly popular among divers from the Kanto region, making it a viable option for day trips.

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Atami Kosoga Cave

Atami Kosoga Cave, located in Shizuoka, features a semi-enclosed cave that extends 40 meters in length and is situated at depths ranging from 6 to 12 meters. The cave is accessible from November to April and is suitable for beginner divers due to its spacious interior and open ceiling, which allows sunlight to illuminate the area, creating a blue gradation effect. The site is home to schools of snappers, rockfish, and mackerel, which can be seen moving through the light. Additionally, the sandy areas nearby may conceal sharks and bullhead sharks. Entry to the site is via the shore, making it convenient for divers.

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Atami Wreck

The Atami Wreck, known as the Asahi 16, is a gravel transport vessel that lies split in two beneath the surface. This shipwreck is situated in sandy surroundings, providing a unique habitat for various marine species. The bow area features a winch that attracts a variety of colorful fish, while the hull is adorned with soft corals that often shelter flounder. Divers can observe anemones, anthias, and red snapper near the bow. The site is accessible from the shore, with descent ropes available at both ends, enhancing the diving experience.

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B&G Marine Center

B&G Marine Center, located in Amami City, Kagoshima, features a heated indoor pool suitable for swimming and training, but it is not a diving site. The center includes a 25-meter competition pool and a toddler pool, making it a popular choice for local residents and youth teams. For diving enthusiasts, it is recommended to explore other dive sites or specialized dive shops in the vicinity for marine life experiences.

28.4421, 129.6978

Banjin Beach

Banjin Beach, located in Kashiwazaki, faces the Sea of Japan and provides calm diving conditions. The site features a maximum depth of 10 meters and allows for shore entry, making it accessible for divers of all experience levels. The underwater environment includes sandy and rocky areas, as well as seaweed forests, which are home to various marine life such as seahorses, nudibranchs, dungeness corals, jellyfish, and schools of horse mackerel. Seasonal variations in marine life are notable, with nudibranchs and seahorses present from spring to early summer, while summer to fall brings schools of horse mackerel and jellyfish.

37.3661, 138.5288

Barachin (Wreck)

The Barachin wreck, a battleship from World War II, is situated in Takinoura Bay on Chodo Island. This site is accessible from Chichijima and features a wreck at a depth of approximately 12 meters. The wreck is fragmented and serves as a habitat for various marine species. Divers can observe schools of root fish, large snappers, groupers, and Scorpionfish. Additionally, ribbonfish and cleaning shrimps, including Red-headed Shrimps, can be found in the area. The surrounding reefs, which reach depths of 20 meters, are populated with diverse fish species such as Scabiosa and Keramahana. The site typically experiences little to no current, making it suitable for beginner divers.

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Beach Bum

Beach Bum is an outdoor artificial pool located just 5 minutes from Keikyu Misakiguchi, providing a controlled environment ideal for diving and snorkeling training. The site is easily accessible from the shore, making it suitable for beginners and those practicing their skills. While there is no marine life present due to its artificial nature, divers can enjoy scenic views of the sea and Mt. Fuji, particularly during April sunsets when the sun aligns perfectly over the peak.

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Benten Island

Benten Island, located near the town of Onagawa in Miyagi Prefecture, offers divers a unique experience where the Oyashio and Kuroshio currents converge. This site features a variety of marine life, including fixed nets, oysters, and sea squirt shelves. Divers can observe a wall of ascidians, which is a distinctive characteristic of this northern dive site. Throughout the year, sightings of dangler fish are common, and divers may witness their spawning behavior. Additionally, the area is home to various northern nudibranchs, dandelions, and anchidnails, making it an interesting site for marine biodiversity. The entry to the dive site is from the shore, providing easy access for divers.

38.4363, 141.4874

Bitagane

Bitagane is situated near the wreck at Atami and features fixed buoys marking depths between 18 to 20 meters. The western side, known as No.1 root, maintains a depth of approximately 20 meters, while the eastern side, or No.2 root, descends to around 30 meters. The site is characterized by strong currents that draw in a variety of fish species. Seasonal gatherings of anthias can be observed around the reef, and coral anemones at No.2 root provide habitat for clownfish and damselfish. Additionally, transient species are frequently spotted in this area.

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Bizen

Bizen is located on the west side of Kushimoto and features a deep point reaching approximately 18 meters beneath the anchor. The site includes two prominent roots near the anchor and is characterized as a channel. The sandy areas on the west and south sides are notable, with the southern sandy region serving as a spawning ground for cuttlefish during certain seasons. To the north, divers can explore a series of coral reefs, leading to a sandy bottom that extends to depths of about 25 to 27 meters. The site typically experiences minimal current, making it accessible for divers of all skill levels. In the northern sandy area, gobies are frequently observed as water temperatures rise. The coral reefs host various marine life, including jawfish, frogfish, and razorfish. Additionally, during winter months, large schools of yellowtail can often be seen, while gimpfish are present year-round near the large roots.

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Blue Cave

Blue Cave, located at Cape Maeda in Onna Village, Okinawa, is recognized for its distinctive blue illumination, which results from sunlight reflecting off the sandy bottom. The site features depths ranging from 5 to 7 meters, making it suitable for divers of all experience levels. The area is home to a variety of marine species, including sparrowhawks, butterflyfish, nudibranchs, crustaceans, jellyfish, and turtles, with activity peaking during the summer months. This site is accessible via shore entry, providing an easy access point for divers and snorkelers alike.

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Bolo Point

Bolo Point is a dive site located off Cape Zampa, Okinawa, known for over 20 swim-throughs and a vertical wall with a cavern at the south end. Divers often encounter manta rays, giant trevallies, and Napoleon wrasses, as well as smaller species like angelfish, parrotfish, and lionfish. The site features hard coral and is home to octopus in crevices and rock ledges.

26.4427, 127.7138

Bounotsu

Bounotsu is situated on the western side of the Satsuma Peninsula, facing the East China Sea. The site allows for diving at various times, depending on wind conditions. Visibility ranges from 10 to 30 meters. Water temperatures can vary significantly, with readings of 8.5 degrees Celsius in September and potentially reaching up to 30 degrees Celsius. Divers can experience a drift dive at the drop-off, where sightings of larger marine life are common, including blue snapper, sea turtles, bluefin tuna, humpback snappers, and stingrays. Additionally, large schools of humpback snappers, flathead damselfish, and sea anemones can be observed, along with occasional appearances of kuei and cod rays.

31.3121, 130.2116

Budaine

Budaine is located near Kamikimoto Island, which is uninhabited and accessible via a 20-minute boat ride from the harbor. This dive site is known for the seasonal presence of hammerhead sharks, particularly from summer to autumn when the Kuroshio Current influences the area. Divers can also encounter sandbar sharks and blacktip sharks. The current can attract a variety of large pelagic species, including sunfish, sailfish, whale sharks, manta rays, and eagle rays, making it a notable location for marine life observation.

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Buddha Coral

Buddha Coral is located off the coast of Amami Oshima, which is situated between Kagoshima and Okinawa. This dive site features a prominent coral formation resembling a giant Buddha, known as Daibutsu Coral, measuring approximately 20 meters in diameter and 7 meters in height. The dive site reaches a depth of around 16 meters and is characterized by sandy white substrates. Divers can observe a variety of marine life, including colorful flounder, butterflyfish, snappers, lionfish, scorpionfish, and spotted angelfish. In the sandy areas, garden eels and fine-tailed dingbats can also be found. The site is suitable for beginner divers due to its relatively shallow depth and gentle conditions. Entry to the site is from the shore.

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Bumb Tokyo Sports Culture Center

The Bumb Tokyo Sports Culture Center is situated in Yumenoshima, Koto-ku, Tokyo, and features a 25-meter indoor pool. This facility is designed for various swimming activities, promoting health and relaxation in a controlled environment. As an indoor site, it does not host any marine life, making it suitable for training and recreational swimming. The center is accessible via shore entry.

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Butsu Butsu Sango

Butsu Butsu Sango, located near Kabi-jima in the Kerama Islands, is a boat dive site characterized by its calm conditions. The site features coral formations that resemble Buddha heads, with depths ranging from 3 to 20 meters. Divers can observe a variety of marine life, including Luris sparrowhawks, goatfish, yellowtail, and debassel snappers, as well as butterflyfish and bear clams. Occasional sightings of sea turtles can also be experienced over the vibrant coral reefs.

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Candle Rock

Candle Rock features a diverse underwater environment characterized by numerous caves and crevices. These formations are home to a variety of marine life, including snails, octopuses, and small fish such as scorpionfish and flatfish. The area is rich in plant life, with seaweed and reef mollusks thriving in the nooks and crannies of the rocks. Divers can explore the intricate spaces among the stones, where they may also encounter sea stars. The site is accessible via shore entry, allowing for easy access to the underwater exploration.

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Canyon

Canyon is located on the eastern side of Tokashiki Island in the Kerama Islands, accessible via shore entry. This dive site features a unique crevice formation between two reefs, making it ideal for divers interested in geological structures. During the summer months, sunlight penetrates the crevice, enhancing the underwater visibility. Marine life commonly observed here includes green sea turtles, various species of damselfish, and lobsters. Other notable species include the sleepy shark, sea slugs, and several types of anemonefish. The area is also home to eels, pufferfish, lionfish, butterflyfish, and wrasses, providing a diverse diving experience.

26.1704, 127.3621

Cape Maeda

Cape Maeda, located in Onna Village, Okinawa, is known for its notable 'Blue Cave' where sunlight creates a distinctive blue illumination. The dive site features vertical holes and drop-offs, with depths reaching 30 to 40 meters. It is home to a variety of marine species, including schools of migratory fish, yasha gobies, hammerhead gobies, butterflyfish, wrasses, nudibranchs, sea turtles, and Napoleon fish. This site offers diverse experiences suitable for both novice and experienced divers.

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Cape No.6

Cape No.6, located on the east side of Zamami Island, features depths reaching 25 meters and is characterized by clear Kerama blue waters. The site is suitable for divers of all experience levels and is abundant in marine life, including clownfish, snappers, sawfish, moray eels, and both green and loggerhead turtles. Additionally, divers can observe macro species such as nudibranchs and pygmy seahorses, along with extensive coral colonies, sea fans, and isobana formations, making it ideal for both macro and wide-angle photography.

26.2338, 127.3348

Cape No.7

Cape No.7, located at coordinates 26.239300, 127.332200, is a shore entry dive site known for its diverse marine life. The site features depths reaching up to 40 meters and is home to green and hawksbill turtles, as well as various species of sharks, mollusks, and crustaceans. Divers can also encounter spiny dogfish and wrasse among the vibrant corals. The area is suitable for both beginners and advanced divers, offering a rich underwater experience with seasonal nudibranchs and unique coral formations.

26.2393, 127.3322

Cappadocia

Cappadocia is a shore dive site characterized by coral formations resembling the UNESCO World Heritage site in Turkey. The dive area is situated on the outer reef of Miruchibishi, with depths ranging from 10 meters at the shallowest point to 30 meters deeper. Visibility is generally good, ranging between 20 to 40 meters. Marine life includes green turtles, banded sea snakes, and whitetip reef sharks. Notably, cuttlefish are observed mating and laying eggs from March to May.

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Capybara

Capybara dive site features a notable drop-off with a depth reaching approximately 35 meters. The area is characterized by rocky formations that slope gently, providing divers with opportunities to explore various archways, tunnels, and crevices. During safety stops at shallower depths, divers often encounter hawksbill turtles. The site is also home to a variety of marine life, including Taima fish, Napoleon fish, Bigeye Jacks, Giant Trevally, Bullhead Rays, Loggerhead Turtles, and Green Turtles. The vibrant coral and schools of snappers, particularly red snappers, contribute to the rich biodiversity of the underwater ecosystem.

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Chishi

Chishi is located on the northern side of Zamami Island in the Kerama Islands, approximately one hour by boat from Naha. This dive site is particularly popular during the summer months when the winds are from the south. It features a series of crevices within the reef, making it an ideal spot for divers interested in underwater topography. The site is known for its clear coral formations and is also frequented by skin divers. The crevices are one-way, which can lead to increased traffic during peak times, but it remains one of the top summer dive locations in the Kerama Islands. Marine life includes green sea turtles, golden damselfish, sleepy cod, sea slugs, and various species of clownfish, as well as moray eels, pufferfish, lionfish, butterflyfish, and lobsters.

26.2478, 127.3141

Chishima

Chishima is located approximately 10 minutes by boat from Kamiko Port. This uninhabited island features a drop-off that ranges from 5 meters to over 40 meters, making it a notable dive site. Divers can expect to encounter schools of Spanish mackerel, yellowtail, kanpachi, and horse mackerel. The site is also home to scorpionfish, snappers, and bluefin reef squid. While the underwater scenery is dynamic, diving conditions are best in the summer months, as winter can present challenges.

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Chū hana No.2

Chū hana No.2 is located in Kuki, Owase City, Mie, along the Sea of Kumano. This dive site reaches depths of up to 32 meters and is known for its diverse marine life. Divers can encounter schools of cherry snappers, various nudibranchs, and occasionally green turtles. The site also features larger species such as giant groupers and catsharks. The warm winters in this area are influenced by the Kuroshio Current, making it a favorable diving location.

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Coral 1

Coral 1 is located at the southern tip of Ukihara Island, just past the break. This site features a coral-rich environment with several swim-throughs. The average depth ranges from 10 to 20 meters, with some areas exceeding 30 meters, accommodating divers of various skill levels. Large marine life can frequently be observed along the reef wall and its extensions, particularly just outside the Uruma Barrier Reef.

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Coral Garden Amami Oshima

Coral Garden, located in Amami Oshima, Kagoshima, showcases diverse coral formations, including Palau coral, at depths ranging from 8 to 10 meters. The site experiences minimal current, making it suitable for divers of all experience levels. It is accessible throughout the year, with a boat ride of approximately 10 minutes from the nearest launch point. The marine life here includes a variety of colorful fish, red snappers, turtles, rays, and crustaceans such as frigate shrimp, making it an excellent location for macro diving.

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Cross Hole

Cross Hole, located on Irabu Island in Okinawa, features a cave system with depths ranging from 5 to 27 meters. The site is characterized by a cross-shaped opening in the ceiling that allows light to filter in, enhancing the underwater experience. It includes both vertical and horizontal passages, making it accessible for beginner divers while still providing impressive topographical features and light effects. Marine life observed here includes bluefin tarpon, longnose hawkfish, red clownfish, turtles, gurukuns, and various macro species such as myaqueous lobsters and lance fish.

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Cross Line

Cross Line is a dive site characterized by a combination of coral reef and sandy bottom. The name derives from a submerged fishing line that crossed the area, which was lost during a typhoon. Divers can observe a variety of macro marine life along this line. Notable sightings include green sea turtles, often accompanied by remoras, and several colonies of clownfish. Other marine species that can be encountered here include pipefish, seahorses, and various types of wrasses and blennies.

26.5092, 127.8849

Crystal Beach

Crystal Beach, also known as Yamahara Beach, is located in Kabira, Ishigaki. This site is characterized by its natural crystal deposits originating from the river of Mt. Omotodake. The waters here are clear and host a variety of marine life, including coral reefs, clownfish, and sea turtles. Access to the beach is via a steep slope, and divers should be aware that facilities are limited, necessitating careful preparation and caution before diving.

24.4495, 124.1742

Crystal Park

Crystal Park, located on Shimoji Island in Okinawa, features a maximum depth of 10 meters. The site is characterized by coral heads distributed over a bed of fine white sand. Divers can expect to encounter clear blue waters, making it suitable for leisurely dives. Marine life includes schools of snappers, juvenile fish, clams, nudibranchs, slipper lobsters, gobies, and juvenile tench. The best time for diving here is from fall to spring.

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Daimaru

Daimaru is located approximately one hour by boat from Naha Port. This dive site features clear waters and a variety of colorful corals, along with crevices and swim-throughs that are home to diverse marine life. Divers may encounter species such as triggerfish, sea snakes, clownfish, turtles, and blue damsels, as well as both soft and hard corals.

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Devil'S Cove

Devil's Cove is a dive site in Okinawa featuring a sunken fishing boat and diverse marine life, including coral species, sea sponges, and various fish such as angelfish and cuttlefish. The maximum depth is 15 meters (50 feet), with average visibility of 12-15 meters (41-50 feet) and water temperatures ranging from 19-21°C (66-70°F). Entry is from the shore.

26.3627, 127.7360

Dobuiso

Dobuiso is located on the eastern side of Chichijima and features a channel rich in marine life. Divers can expect to see bigeye jacks, blacktip reef sharks, barracuda, and rock cod within the channel. Beyond this area, larger pelagic species and schools of fish are prevalent. Additionally, sightings of dogtooth tuna, kingfish, Spanish mackerel, whitetip sharks, and various pipefish and copperheads are common. During safety stops, dolphins may occasionally be spotted, enhancing the diving experience.

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Dougashima

Dougashima, located in Nishi-Izu, Shizuoka, features diverse underwater landscapes and a variety of marine species. The site includes entry points from the Tenmado-do Cave and Saku-ne, with the presence of undersea hot springs. It is suitable for divers of all experience levels and showcases different marine life throughout the seasons. Notable species include snappers, yellowtails, amberjacks, nudibranchs, morays, red-spotted shrimp, and aobudai, along with seasonal sightings of sunfish. The site offers opportunities for both macro and wide-angle photography.

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Dragon Lady

Dragon Lady is located on Zamami Island within the Kerama Islands. This dive site is often visited from October to April when northern winds are prevalent. The area features a gentle sandy slope, making it suitable for beginner divers. While encounters with coral and sea turtles are less frequent, the site offers excellent visibility characteristic of the Kerama region. Divers can expect to see a variety of marine life, including garden eels, damselfish, and glassfish. Other species that may be observed include frogfish, seahorses, and various types of clownfish. However, sightings of sea turtles remain low.

26.2312, 127.3263

Dream Hole

Dream Hole is a popular dive site characterized by a drop-off that begins at a depth of 5 meters and descends to over 40 meters. A notable feature of this site is a narrow hole at the top of the reef, allowing divers to descend vertically for about 25 meters into a cave. The exit of the cave extends horizontally for approximately 15 meters, with its silhouette resembling that of Pikachu, which is a distinctive aspect of this location. Marine life commonly observed here includes species such as the glassy sweepers, golden sweepers, violet-lined anthias, garden eels, lionfish, and various other fish like the Taiwan shad and pygmy seahorses.

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Emperor’s Chair

Emperor’s Chair, located off the Ishigaki Peninsula, is an advanced dive site with depths ranging from 20 to 40 meters. The site is characterized by strong currents and a prominent bill-shaped root structure. Divers can expect to encounter a variety of marine life, including schools of butterflyfish, dogtooth tuna, Napoleon fish, manta rays, and pygmy seahorses. This site is particularly suited for experienced divers due to its challenging conditions.

24.4855, 124.1097

Enokuchi

Enokuchi is a notable dive site located on Mikomoto Island, characterized by its average depth of approximately 20 meters. Divers often navigate towards a prominent root structure known as 'Kadone' situated to the west. The site is particularly significant from summer to fall, as it attracts a variety of shark species, including hammerhead sharks, making it an important habitat for these marine animals. The entry to the dive site is from the shore, allowing for easy access to the underwater environment.

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Enoura

Enoura is located on the west side of Kanagawa in the Nishishon area, providing a safe diving experience with a sloped entry and underwater guide ropes. The maximum depth at this site is 16 meters, making it suitable for beginner divers. Divers can follow the guide rope to discover a Doraemon statue positioned at 15 meters. The site features various underwater structures, including reefs, caissons, and grottoes, and is home to diverse marine life such as snappers, frogfish, nudibranchs, and blue squids during their egg-laying season. Annual cleaning of the site occurs around November, and the best time to visit is from spring to early summer.

35.1914, 139.1388

Fukuura

Fukuura is situated on the west side of the Manazuru Peninsula, making it easily accessible from the Kanto region. This dive site features a beach entry and is known for its significant colony of coral anemones, which spans approximately 40×40 meters and is located at depths ranging from 1 to 10 meters. The anemones are home to various marine species, including clownfish, frogfish, foxface rabbitfish, hornbills, and catsharks, providing a diverse underwater experience.

35.1504, 139.1340

Fushikikokubu

Fushikikokubu, located in Takaoka, Toyama, is a shallow dive site with a maximum depth of 5 meters, accessible via a beach entry at Kokubu Seaside Park. The area is known for its diverse marine life, particularly around the offshore wave blocks. Seasonal highlights include cuttlefish spawning in spring, various coral fish and yellowtails in summer, mackerel and red barracuda in fall, and nudibranchs and dungeness in winter. This site is suitable for divers of all experience levels throughout the year.

36.8045, 137.0541

Futo

Futo is a well-known dive site located in East Izu, featuring two main beach access points. The site is equipped with ramps and handrails, facilitating easy entry and exit for divers. The conditions are generally calm, making it suitable for beginners. From June to August, divers can observe large squids spawning in the area. The beach is also rich in marine life, showcasing a variety of anemones and numerous clownfish.

34.8970, 139.1327

Futou

Futou is located in Nishi-Izu and can be accessed via a shore entry. The site features a mix of sandy areas leading to rocky terrain, with notable geological formations including caves, caverns, and arches. It is suitable for night diving throughout the year. Marine life is diverse, with nudibranchs present year-round, particularly abundant in spring. Divers can also encounter stingrays, flatworms, and sharks in the sandy regions, along with the seasonal spawning of blue squids during spring.

34.7944, 138.7580

Gina

Gina, located on Aka Island in Okinawa, features a maximum depth of 18 meters and is characterized by calm currents, making it suitable for divers of all experience levels. The site is known for frequent sightings of green turtles, with manta rays occasionally appearing during the summer months. The underwater landscape includes coral shelves and is populated by schools of goatfish, blue tangs, and sparrowhawks, contributing to a diverse marine environment.

26.2115, 127.2767

Ginowan Marine Center

The Ginowan Marine Center is an outdoor training facility located in Ginowan city, Okinawa. It features two distinct pool areas for diving training. The shallow water section has a depth of 1.2 meters and spans 25 meters in length, equipped with five or more lanes. The deep water section exceeds 3 meters in depth. As it is a pool environment, there is no marine life present. This facility is also suitable for freediving training. Additionally, a farmers market is located adjacent to the center.

26.2842, 127.7435

Glass World

Glass World is situated at one end of a tidal cape, featuring a shallow area approximately 8 meters deep near the anchors. The site has four main anchor points, with depths reaching around 15 meters at the other locations. Divers will encounter clusters of white corals, which should not be touched to preserve the habitat. The sandy bottom and root structures require divers to maintain neutral buoyancy to prevent sand disturbance. The area experiences minimal current, making it accessible for divers. Common marine life includes green turtles resting in the shallow Shikoro coral zone, various wrasse species, macro creatures like jawfish and seahorses in sandy patches, and schools of snappers, particularly solas snappers near the roots and shallows.

33.4527, 135.7526

Gorilla Chop

Gorilla Chop, located at Sakimotobu Beach in Motobu Town, is a shore dive site known for its calm conditions even during the winter months when northern winds prevail. This site attracts many divers, particularly in winter, due to the presence of macro marine life such as frogfish, ornate ghost pipefish, and nudibranchs. Other species commonly observed include giant frogfish, banded sea kraits, cuttlefish, tonguesole, clownfish, damselfish, lionfish, octopus, boxfish, and trumpetfish. Facilities at the site include showers and restrooms, although hot water may not always be available. Parking is accessible from 8:30 AM, and facilities open at 9:00 AM.

26.6362, 127.8824

Gorilla Chop

Gorilla Chop is a dive site with a maximum depth of 15 meters (50 feet), making it suitable for novice divers. The site features a rock formation resembling a gorilla and offers diverse marine life and coral structures. Entry is from the shore.

26.6057, 127.8924

Goto Islands

The Goto Islands consist of over 140 islands located approximately 130 km west of Nagasaki, accessible by boat in about 90 minutes. The intricate coastline offers numerous diving locations. The area is influenced by the Tsushima Current, resulting in a rich marine environment with dense fish populations. Divers can observe a variety of marine life, including large migratory species such as yellowtail and bluefin tuna, as well as schools of colorful fish like sea bass and big yellowtail. The underwater landscape features both colorful corals and soft corals, enhancing the diving experience.

32.9443, 129.0273

Grott 1

Grotto 1, located in Minami Ise, Mie, is known for its unique cave-like structure where light penetrates the cavern. The site features a depth of over 25 meters, where divers can observe various marine species including schools of tuna, blacktip reef fish, Japanese snook, and snappers. The area is also home to Dall's shark, kuei, frogfish, and nudibranchs. Surrounding roots at greater depths provide habitat for rock lobsters and enhance the underwater scenery.

34.2984, 136.6648

Hamahiga Beach

Hamahiga Beach, situated on Hamahiga Island within Uruma City, Okinawa Prefecture, features a man-made beach characterized by its white sand and clear, shallow waters. This site is suitable for snorkeling and is known for its diverse marine life, including small tropical fish such as snappers and bears, along with nudibranchs, starfish, and gobies inhabiting the coral reefs. The beach serves as a convenient entry point for various marine activities, making it a family-friendly location.

26.3235, 127.9502

Hamayu Beach

Hamayu Beach, located in Minami Ise, Mie Prefecture, is a tranquil dive site situated in Gokasho Bay. The site is characterized by shallow depths and minimal current, making it suitable for beginner divers, training sessions, and refresher dives. Throughout the year, divers can observe a variety of marine life, including octopus, small fish, nudibranchs, and seasonal jellyfish blooms. The underwater environment also features diverse seaweeds and ascidians, contributing to the rich biodiversity found in these shallow waters.

34.3223, 136.6606

Hammerhead Rock

Hammerhead Rock is located at a depth of 35 meters, characterized by vertical rock formations that rise dramatically from the seabed. This site is known for the high likelihood of encountering schools of hammerhead sharks. Divers may also observe large pelagic species, including bluefin tuna, bluefin trevally, barracudas, and bigeye trevally. Occasionally, marlin tuna, whale sharks, and dolphins can be spotted in the area. The entry to this dive site is from the shore.

24.4488, 122.9285

Hanare Beach

Hanare Beach Mae, located in Awaren, Tokashiki Village, offers a shallow dive site with depths ranging from 3 to 8 meters. The area is characterized by calm waters and minimal current, making it suitable for beginners and those snorkeling. The sandy bottom is interspersed with coral roots, providing habitat for various marine life. Notable species include schools of snappers, scorpionfish, ribbonfish, bigeye, yellow snappers, clownfish, spiny dogfish, and goatfish. The site is easily accessible from the shore.

26.1656, 127.3419

Hanazawa Drop

Hanazawa Drop, located in Yonehara, Ishigaki, features a notable drop-off at a depth of 22 meters. The site is characterized by a small root that provides habitat for various marine life, including scorpionfish, ribbonfish, and shrimp, which are often cleaned by bluefin groupers. The area is known for its rich macro life, including scarletts, red-shimmer shrimp, and blue-spotted shrimp, as well as rooted fish such as blue-ringed and Kerama snappers. With generally calm currents, this dive site is suitable for both beginner and intermediate divers.

24.4615, 124.2025

Hasama Ocean Park

Hasama Ocean Park is located in the inner bay of Tateyama on the Boso Peninsula. The primary method of access is via boat, with the nearest dive point, known as 'Takane', situated approximately 5 minutes from the harbor. This site features a shrine and a large torii structure submerged in the water. Divers can expect to encounter a variety of marine life, including soft corals, colorful fish, lobsters, nudibranchs, and frogfish.

34.9751, 139.7830

Hateruma Island

Hateruma Island is located south of Iriomote Island and is accessible by ferry from Ishigaki Island or Iriomote Island for diving. All dives at this site are conducted from boats. The island is known for its exceptional water clarity, which can exceed 50 meters, and features stunning blue waters over pure white sand. The northwest shore has numerous sandy areas, while the east shore offers drop-offs and opportunities to see large migratory species. Divers can expect to encounter a variety of marine life, including high-density populations of small fish around sandy coral, kelpfish, flying fish, and seahorses. Additionally, migratory fish such as bluefin and yellowfin tuna, as well as sharks like white and red hammerhead sharks, and various rays including eagle rays and stingrays, can also be observed.

24.0721, 123.7745

Haunted Mansion

The Haunted Mansion at Lake Motosu is a freshwater dive site characterized by a prominent sunken tree surrounded by algae, which gives it a unique appearance. Situated at an altitude of 900 meters, this dive requires careful buoyancy control. Divers can expect to encounter a variety of freshwater species including black bass, catfish, and nudibranchs, along with other aquatic life such as ayu, wakasagi, and various types of carp. The site offers a diverse ecosystem with macro life present among the submerged trees and vegetation.

35.4683, 138.5753

Hayakawa

Hayakawa, located in Odawara, Kanagawa, is a shore dive site suitable for beginners. The site features shallow and calm waters with sandy bottoms and artificial reefs. Divers can encounter a variety of marine life, including horse mackerel, amberjack, seasonal migratory fish, spiny dogfish, catsharks, and winter dungeness crabs. The area is also rich in nudibranchs and macro life, making it an interesting spot for underwater photography. Diving conditions are favorable year-round, allowing for diverse diving experiences.

35.2313, 139.1435

Hebi no kuchi

Hebi no kuchi features a combination of layered rock formations and sandy areas, reaching depths of approximately 20 meters. The site is home to a variety of marine life, including black rockfish, sparrowhawks, yellowfin wrasse, and green reef fish. Divers can also observe blue corals, soft corals, anemones hosting clown shrimp, as well as nudibranchs. The presence of trevally, squid, scorpionfish, shrimps, mussels, crabs, and sea slugs adds to the biodiversity of this dive site.

34.0114, 136.2598

Heinaicho

Heinaicho, located at the Natsudomari Peninsula in Tsugaru, Aomori, features a combination of rocky and sandy substrates. The site is known for its diverse marine life, particularly during the spring months when nudibranchs such as cat-billed, emulonectes, hymenoptera, and eda are prevalent. Additionally, the charming himeika can also be spotted. The clear waters surrounding Oshima Island enhance visibility, making it suitable for divers of all experience levels. This site showcases the vibrant ecosystem of Mutsu Bay, with opportunities to observe both macro species and migratory fish.

41.0093, 140.8821

Hidenchigama

Hidenchigama is characterized by its undersea limestone caves, located approximately 1km from the Torijima fishing port on the island's west side. The entrance to the cave is situated at a depth of 35 meters, allowing for access only to divers with technical training due to the complexity of internal penetration. Inside, divers can observe unique formations resembling chandeliers and curtains made of bell limestone. The cave is home to various marine species, including rare shrimps and crabs, as well as spiny dogfish. Notably, a new species of prawn was identified in 2011. Outside the cave, divers may encounter schools of Kingfish, southern groupers, and butterflyfish.

26.3353, 126.7383

Hirasawa

Hirasawa, located in Numazu, Shizuoka, features calm seas throughout the year, making it suitable for divers of all skill levels. The site has multiple entry points and presents a variety of underwater landscapes, including sandy bottoms, rocky reefs, and coral colonies. It is an excellent location for both macro and wide-angle photography due to the diverse marine life present. Notable species include Goby Goby, Negoribo, Frogfish, Sea Slugs, Blue Squid, Cuttlefish, Nudibranchs, and Sparrowhawks, providing ample opportunities for observation and photography.

35.0213, 138.8639

Hokkawa Kajikaki

Hokkawa Kajikaki, located in Higashi Izu, Shizuoka, is a boat dive site situated just 5 minutes from the harbor. The dive depths range from 12 to 24 meters, with an average depth of 14 to 16 meters, making it suitable for divers of all experience levels. The site is characterized by colorful soft corals and is home to large schools of horse mackerel, as well as various marine species including Japanese horn sharks and wrasse. Additionally, divers may encounter catsharks, basking sharks, frilled shrimp, Pikachu sea slugs, and blue anglerfish. Access to this site is convenient, requiring a 1.5-hour Shinkansen trip from Tokyo.

34.8218, 139.0786

Hozaura Nakahirase

Hozaura Nakahirase, located in Minami-ise, Mie, features a calm dive environment along the rias coastline, surrounded by mountainous terrain. The site offers stable sea conditions throughout the year and reaches depths of up to 24 meters, making it accessible for divers of all experience levels. Divers can enter the water from the shore, with rafts available to facilitate various entry techniques. Marine life at Nakahirase includes schooling black rockfish, snappers, juvenile clownfish, zebra and warty crabs, monkfish, lobsters, and soft corals, including spiny scorpionfish.

34.2409, 136.5001

Iki Island

Iki Island, situated in the Genkai Sea, spans 17 km from north to south and 14 km from east to west. The island's underwater environment is characterized by vibrant soft corals and a variety of seaweeds. The currents bring in plankton, which attracts numerous fish species. In the fall, divers can observe large schools of yellowtail, flathead mackerel, groupers, and stingrays, along with the occasional sighting of Etisian jellyfish during winter months. Additionally, there are notable megaliths in the area that appear to have been shaped by human activity, adding an intriguing element to the dive experience.

33.7668, 129.7216

Imazuni

Imazuni is a well-known dive site located on the northern side of Kume Island, accessible via a short shore entry. The site is characterized by its diverse marine life, including migratory species such as bigeye trevally and bluefin tuna, as well as larger fish like pike and Napoleon wrasse. The underwater landscape features vibrant corals, including the brightly colored floundering flounder, red-headed flounder, snapper, and grouper. This site offers a unique opportunity to observe a variety of fish in their natural habitat.

26.3551, 126.8250

Inan South

Inan South is a shore entry dive site located at coordinates 26.367700, 127.723200. The depth ranges from 5 meters to 18 meters, making it accessible for snorkelers and novice divers. The site is characterized by a lack of current, allowing for a relaxed diving experience. It is particularly noted for its diverse population of anemone fish, along with sightings of garden eels and rare goby species. Divers should remain cautious of rock fish that may be concealed in the sandy areas.

26.3677, 127.7232

Inatori Port

Inatori Port, located in Higashi Izu, faces south and provides stable sea conditions throughout the year, even during narai winds. The site features a 700-meter stretch of gorota and white sand, making it accessible for divers of all experience levels. Underwater guide ropes and buoys facilitate navigation, enhancing the self-diving experience. Marine life includes schools of snappers, clownfish, honeyeater anemonefish, nudibranchs, frogfish, as well as sightings of turtles and eagle rays.

34.7718, 139.0472

Iriomote Island

Iriomote Island, often referred to as the 'Galapagos of the East,' features a diverse underwater ecosystem alongside its lush terrestrial environment. The island is predominantly covered by virgin forest and includes mountains that rise between 300 to 400 meters. The surrounding waters are home to a variety of marine life, including pelagic species such as dogtooth tuna, yellowfin reef sharks, and toothfish. Divers can explore unexplored coral gardens and encounter a range of reef fish, as well as the possibility of spotting manta rays. The site is known for its macro photography opportunities, particularly in areas like Manjushimodoki and Nishikiteguri. Entry to the dive site is from the shore, providing easy access to the underwater features.

24.4070, 123.8071

Iriomote Tokakinsone

Iriomote Tokakinsone is a notable dive site characterized by its 15-meter deep mountainous structure, making it suitable for drift diving. Divers can expect to encounter large schools of barracuda, bigeye jacks, and isomaguro (dogtooth tuna). The site also hosts various marine life, including sea stars, butterflyfish, and sea turtles. While beginners are welcome, they should be aware of the potential for strong currents in the area.

24.4577, 123.7843

Ishibashi

Ishibashi is located near the city center, making it accessible for day trips with the potential for multiple dives. The site features a beach entry that involves descending a slope leading to a rocky area. After approximately 100 meters of swimming offshore, divers will reach a broad sandy expanse. Seasonal marine life includes dandelion fish, particularly in their early life stages, and a variety of nudibranchs. Frogfish are present year-round, along with catsharks and glass gobies.

35.2253, 139.1418

Ishikiri

Ishikiri is primarily known for macro diving, especially during the winter months when a variety of macro species can be observed. The site requires a shore entry, but the access point can be challenging due to poor footing, making it difficult to enter when there are waves. There are no parking facilities or amenities, which can make it tough for less experienced divers. Notable marine life includes the rare Nakamoto's pygmy goby, frogfish, cuttlefish, and various nudibranchs. The water temperature typically drops below 25 degrees Celsius from November to March, which correlates with an increase in macro species sightings.

26.6043, 127.9177

Isuzumi Reef

Isuzumi Reef features a flat root structure that extends into sandy areas, with two buoys marking shallow and deeper sections. The dive site experiences minimal current, making it accessible for divers of all skill levels. A prominent feature of the reef is a large arch within the root, where clusters of soft corals thrive and provide a habitat for various marine life. In the shallower regions, divers can observe schools of giant snappers and butterfly fish, particularly during the summer to autumn months when butterfly fish often gather in large groups. Additionally, the tunnels in the area are home to kelp and threadfin fish, which can frequently be seen resting.

33.4760, 135.7434

Ita

Ita, located in Numazu City, Shizuoka, is a well-known beach dive site in Nishi Izu, recognized for its clear waters often referred to as 'Ida Blue.' The site features a gentle rocky slope that accommodates divers of all skill levels and supports a diverse marine ecosystem with a good tidal flow. It is suitable for both macro and wide-angle photography, making it a popular choice for divers throughout the year. Marine life includes schools of snapper, hawkfish, and yellowtail, along with macro species such as frogfish and nudibranchs. Seasonal highlights feature spawning squid and the presence of sea turtles.

35.0000, 138.7789

Ito

Ito is a dive site located in Tateyama, Boso Peninsula, Chiba Prefecture. This site is known for its impressive marine life, including large groups of baited sharks and stingrays, as well as significant sightings of groupers. Divers can observe more than a dozen sharks feeding at one time. The dive is conducted from a boat, with buoys marking either end of a long, narrow root. Depending on the current, fish may enter from one buoy and exit from the other, creating dynamic viewing opportunities.

34.9532, 139.7715

Izu Oceanic Park

Izu Oceanic Park is a prominent dive location in Higashi-Izu, accessible from the shore. The site features a variety of marine life, including rare macro species such as frogfish, as well as seasonal migratory fish. Sandy areas are home to stingrays and wobbegongs, with frequent sightings of sea turtles. The facilities include a pool, making it a popular spot during the summer months when beachgoers frequent the area.

34.8833, 139.1322

Izusan

Izusan, located in Atami, Shizuoka, is a boat-entry dive site characterized by clear waters and a rich diversity of marine life. The site is suitable for intermediate to advanced divers and features a variety of underwater environments, making it ideal for both macro photography and wider shots. The area is home to species such as snappers, yellowtails, longnose hawkfish, bullhead wrasse, cocklefish, nudibranchs, and frogfish, appealing to those interested in both macro and migratory fish. The site maintains stable conditions throughout the year, providing a vibrant underwater landscape.

35.1096, 139.0875

Jabne

Jabne, located on Kamikomoto-jima Island in Shimoda, Shizuoka, is an advanced dive site characterized by strong currents and varied underwater terrain. This site is notable for sightings of hammerhead and white sharks, as well as large schools of migratory and resident fish, including amberjack, wrasses, yellowtail, and hawksbill turtles. Rare sightings of sailfish further enhance the site's rich marine biodiversity, providing a dynamic diving experience.

34.5721, 138.9412

Jitsuru

Jitsuru, located near Tokashiki Island in the Keramas, is suited for intermediate to advanced divers. The site features drift diving opportunities with notable tidal flow. Divers can explore drop-offs and coral reefs that are home to a variety of marine life, including bluefish, mudfish, snappers, pygmy seahorses, and frigate shrimp. The underwater landscape is enhanced by rich topography, providing a habitat for Gurukuns and large nebulibusca, as well as vibrant sea fans, making it a visually appealing site for underwater photography.

26.2422, 127.3643

Jogashima

Jogashima is situated at the southernmost tip of the Miura Peninsula in Kanagawa Prefecture, marking the boundary between Tokyo Bay and Sagami Bay. Access is available via a bridge, making it a convenient location for divers from the Tokyo area. During spring, divers can observe over 30 species of nudibranchs in a single dive. The site also hosts a variety of macro-organisms, including dangling fish, seahorses, snails, cuttlefish, and moss damselfish. Additionally, large schools of black marlin and lobster fish can be encountered here.

35.1370, 139.6119

Kabushiwa

Kabushiwa, located in Echizen-cho, Fukui, is a shore-entry dive site suitable for beginners, with depths reaching up to 12 meters. The site features intricate reefs and tunnels, providing stable conditions during the summer months. Divers may encounter schools of horse mackerel, barracuda, and various nudibranchs. A notable feature is the 'First Tunnel,' which contains natural air pockets, enhancing the diving experience.

35.9110, 135.9953

Kadena North Steps

Kadena North Steps is located in central Okinawa and features a beach entry. The dive site reaches depths of up to 20 meters, with an average depth of around 10 meters. The sandy bottom is calm and supports a variety of marine life, including symbiotic gobies, various crustaceans, pufferfish, dogtooth scorpionfish, and longnose hawkfish. Additionally, divers may encounter butterflyfish, schools of dolphinfish, and seasonal nudibranchs among the vibrant soft corals, making it suitable for both novice and experienced divers.

26.3595, 127.7390

Kadone

Kadone is located near Enokuchi and Mitsu-ne on Kamikomoto Island, characterized by significant tidal influences that can make diving conditions challenging, especially for novice divers. The reef depth ranges from 22 to 25 meters, with a peak depth of 19 meters before it drops sharply to 45 meters. This site is notable for the seasonal migration of hammerhead sharks and various other shark species, contributing to its importance as a shark habitat.

34.5756, 138.9391

Kaiho Sports Club

Kaiho Sports Club, located in Shinkawa, Ishigaki, serves as a swim and training facility. It is recognized for hosting various freediving events, including the Pool Freediving CUP scheduled for April 13, 2024. While it is primarily focused on swimming and fitness, it does not function as a dive site for marine exploration. For diving experiences and marine life observation in Ishigaki, divers are encouraged to seek out other dedicated dive locations or specialized dive shops in the area.

24.3524, 124.1479

Kamekichi

Kamekichi, located on Gishibu Island in Okinawa, is recognized for its frequent sightings of green and hawksbill turtles. The dive site features coral reefs that are home to large schools of bigeye snappers and various tropical fish species, including clownfish and white tip clownfish. The shallow areas are suitable for beginner divers, while stronger tidal zones may provide opportunities to encounter larger fish. The site is accessed via shore entry.

26.2283, 127.3651

Kamene

Kamene is located at the southernmost tip of Mikomoto Island and is recognized as a significant site for observing hammerhead sharks and white-tip reef sharks. The area serves as a crucial habitat for various shark species, particularly during the summer to fall months when these species are most commonly encountered. The dive site is accessible from the shore, allowing divers to easily enter the water and explore the underwater environment.

34.5726, 138.9432

Kamigu

Kamigu, located in the northeast of Tokashiki Island, features the clear waters characteristic of the Kerama Islands. The site is home to diverse coral colonies, including kikka, eda, and hamago, set against a backdrop of white sandy bottoms. The maximum depth reaches 25 meters, with gentle tides making it suitable for divers of all experience levels. Access to Kamigu is primarily by boat, accommodating various diving preferences. Marine life includes snappers, butterflyfish, garden eels, gobies, clams, nudibranchs, and the possibility of encountering green turtles or Napoleon fish.

26.2249, 127.3616

Kamigusuku

Kamagusuku is located on Tokashiki Island within the Kerama Islands and features a unique topography ideal for divers. The site includes a series of crevices between the reefs, providing an opportunity to explore varied underwater formations. During the summer months, sunlight penetrates the terrain, creating striking light effects. Divers may encounter green sea turtles, along with a variety of marine life such as anthias, clownfish, and various species of moray eels. The site is particularly recommended for those who appreciate geological formations and diverse marine ecosystems.

26.2105, 127.3732

Kamo Aquarium East Beach

Kamo Aquarium East Beach, located in Tsuruoka City, Yamagata Prefecture, features a diving area with depths ranging from 8 to 12 meters. The site is characterized by a seabed that transitions from seaweed beds at depths of 1 to 3 meters, to gravel at 4 to 5 meters, and sand beyond 5 meters. While large fish are not commonly observed, divers can witness seasonal spawning, hatching, and growth of various marine species. The site offers calm conditions, making it suitable for beginner divers. Facilities include free parking and clean flush toilets, enhancing the overall experience.

38.7626, 139.7264

Kanaya Sunset Beach

Kanaya Sunset Beach, located in Futtsu, Chiba, is approximately an hour from Tokyo. This site is known for its macro life, particularly nudibranchs and moss blennies, making it ideal for underwater photography. The beach provides calm conditions suitable for beginner divers, who can also utilize the on-site saltwater pool for practice. The area offers scenic views of Mt. Fuji and is recognized as a year-round destination for observing diverse small marine creatures.

35.1562, 139.8187

Kanokawa Nakanose

Kanokawa Nakanose, located on southern Iriomote Island, features calm currents and reaches depths of up to 30 meters. This site is known for its seasonal manta ray sightings, particularly from winter to spring. The underwater landscape includes vibrant coral gardens, home to a variety of marine life such as dogtooth tuna, barracuda, and bigfin reef jacks. During the summer months, divers can observe schools of snappers, mud rays, and barracudas. The entry to this dive site is from the shore, making it accessible for divers looking to explore its rich biodiversity.

24.2830, 123.7315

Kashima Coral Beach

Kashima Coral Beach, located on the uninhabited Deer Island within National Park Special Protection Area No. 7, features a dramatic underwater slope that descends steeply at a 45-degree angle. The area is characterized by a diverse ecosystem, with coral formations and shallow bays that provide habitat for various small fish. During the summer months, this site attracts large schools of yellow croaker, while predatory species such as kampachi, horse mackerel, and squid gather to feed. The marine life here includes porgy fish, snappers, groupers, scorpionfish, rockfish, yellowtail, turtles, rays, and occasionally rare sharks. The abundance and size of the fish make this site notable for divers.

32.9513, 132.4562

Kashiwajima Island

Kashiwajima Island is located at the southwestern tip of Shikoku, with a circumference of less than 4 km. This island is part of a national park and is connected to the mainland via a bridge, allowing for shore access. Divers can expect to see a diverse range of marine life, including juvenile fish, migratory species, mouth-rearing jawfish, spawning green squid, and various nudibranchs. Notably, the area is home to the rare blue-eyed goby, humpback goby, and inazebos, which are considered endemic to the island.

32.7699, 132.6238

Kawana

Kawana, located in Ito City, Shizuoka, features calm waters and diverse underwater topography. The site is accessible via shore entry, making it suitable for beginner divers. Throughout the year, divers can encounter a variety of marine life, including frequent sightings of sea turtles and nudibranchs. During spring and summer, gobies are commonly observed, while fall and winter highlight the presence of nudibranchs. Boat dives during the summer months reveal soft coral formations, enhancing the diving experience.

34.9526, 139.1348

Kin Red Beach

Kin Red Beach, located in Kanatake, Okinawa, is a sheltered dive site that remains calm throughout the year, making it suitable for divers of all levels, particularly beginners. The underwater terrain consists of shallow sandy and muddy areas, which are ideal for macro photography. Although visibility can be limited, the site is renowned for its diverse marine life, including a variety of nudibranchs, monoceros shrimp, anemone shrimp, frogfish, leaf eels, and swallow fish, especially around artificial structures. This site is particularly favored by those interested in critter spotting.

26.4470, 127.9134

Kinmenone

Kinmenone is a shore dive site located at coordinates 24.254200, 124.021500. The site features a depth of approximately 17 meters with minimal water flow, making it suitable for beginner divers. The main attraction is a root structure that hosts a significant school of yellow-flanked coral reef fish, creating a dense presence of marine life. Divers can also encounter various carnivorous species, including large groupers, which frequent the area. In addition, the sandy regions may reveal garden eels, while other species such as butterflyfish and snappers are also present. Occasionally, honeycomb moray eels can be spotted, along with smaller creatures like clownfish, nudibranchs, and shrimp.

24.2542, 124.0215

Kitakoura Akaiwa

Kitakoura Akaiwa is located on Sado Island, which is accessible by ferry from Niigata Port in approximately 2.5 hours or by jetfoil in about 1 hour. The dive site features a shore entry and is known for its calm and clear waters during the summer months, with warm temperatures that attract divers. Marine life includes large lobsters, schools of horse mackerel, various anemones, and nudibranchs. Additionally, large ostriches are observed in the winter months as they come to spawn.

38.2803, 138.5101

Kode no dokutsu

Kode no dokutsu features an underwater cave that measures 25 meters in length and 10 meters in width. The cave is relatively shallow, allowing divers to explore at a leisurely pace while searching for large rays and sharks that may be found resting within. The cave's exit is notable for its blue glow, and the upper areas are populated with schools of lanternfish and various marine species, providing a visually striking experience when illuminated. The cave environment supports a variety of fish, including groupers and shrimp, with tiger fish commonly found in the shallower sections. Additionally, large dogfish sharks have been observed resting in the cave, contributing to the site's diverse marine ecosystem.

32.9275, 132.4253

Koganezaki

Koganezaki is situated within Koganezaki Park, providing easy access for divers with ramps and handrails for entry and exit. The dive site features a variety of sandy and rocky areas, with depths reaching a few meters where divers can observe a diverse range of marine life. Notable species include nudibranchs, sea tigers, red-headed gobies, tigerfish, and clownfish, which inhabit the ropes, rocks, and sandy substrates. The underwater landscape transitions from shallow gorotas to expansive sandy surfaces, making it a suitable location for divers of varying experience levels.

34.8433, 138.7624

Kohamajima Island

Kohamajima Island is a small island located east of Iriomote Island, with a circumference of approximately 16 kilometers. The surrounding waters, particularly the Yonara Waterway, are home to around 400 species of colorful corals, including table corals and eda corals. Divers can observe a variety of tropical fish in this area. Notably, there are specific locations within the Yonara Waterway where manta rays can be encountered. The marine life also includes Ryukyukicka corals, eels, scorpionfish, and giant scorpionfish, which are known to prey on smaller fish. During the spring season, the spawning activity of bobwhites is prominent. The site is accessible via shore entry.

24.3243, 123.9713

Kohri Zampa

Kohri Zampa, translating to 'broken lingering waves' in the Okinawan dialect, is a dive site with a notable drop-off reaching depths of 40 meters. Divers typically begin their exploration on the north side of two wash rocks. The dive route allows for a journey through a series of coral formations resembling Babel towers, starting in shallow waters, passing through two distinct arches, and returning to shallower depths. The site is characterized by light filtering through the arches, creating a unique visual experience. Marine life sightings may include Napoleon fish, Nemuribuka, stingrays, and sea turtles. Commonly observed species include Smilax longfin snappers, along with various other fish such as sparrowhawks, gobies, wrasse, butterflyfish, and sea otters. Seasonal rarities like Cinderella nudibranchs and shrimp may also be encountered.

26.4388, 127.7079

Koino Ura

Koino Ura is located in Fukutsu City, providing access to the Genkai Sea. This dive site is particularly suitable for beginners due to its easy shore entry and exit. The area is known for sea turtles that come to nest in July. Divers can encounter a variety of marine life, including scorpionfish, stingrays, mackerel, snappers, sunfish, flatfish, and yellowfin reef sharks. From winter to spring, various nudibranchs can also be observed.

33.8057, 130.4502

Komatsu

Komatsu is accessible only by service boat from Kamiko Fishing Port, as there is no land access. The dive site is situated within a bay, providing protection from severe weather conditions. Divers enter from a sandy area where the depth gradually increases. To the north of the entry point, rocky formations are present, which serve as habitats for various bottom fish. Marine life observed in this area includes grunts, damselfish, horse mackerel, chaga, scallops, wrasses, blenny fish, and sea slugs. Occasionally, yellowtails and butterflyfish can be spotted, influenced by ocean currents. Schools of yellowtail and Spanish mackerel may also be seen moving towards nearby fixed nets.

35.6280, 135.8224

Koza River Nukumi

Koza River Nukumi is a freshwater dive site located along the Furuza River, known for its clear waters. Divers can encounter the giant salamander, which is recognized as a national natural monument, particularly in the upstream region, approximately one hour from Furuza town. The site also hosts various freshwater species, including amago, eels, ayu, catfish, and crustaceans like mole crabs and shrimps. Additionally, amphibians such as the red-bellied newt and freshwater insects like goatfish and kingfish can be observed. The entry to the site is from the shore, making it accessible for divers looking to explore this unique river environment.

33.5513, 135.7771

Kreisel

Kreisel is situated at the entrance of a bay, providing stable sea conditions that accommodate divers of all experience levels. The site is characterized by dynamic rock formations, including arches and holes. Marine life is diverse, featuring species such as frogfish, longfin trevally, yellowtail, amberjack, and hammerhead sharks. Additionally, during the winter to spring months, divers may encounter dungfish and snubnose pompano. Various nudibranchs, including the midget lamprey, purple sea slug, and western barnacle, can also be observed here.

34.2994, 136.6611

KRM

KRM is located on the Kerama Islands, approximately 40 km west of Naha. This dive site is characterized by its clear 'Kerama blue' waters and diverse marine life, including sea turtles, butterfly fish, and tuna, which can be observed year-round. The site offers a variety of diving experiences, from calm bays to drift dives in open waters, making it suitable for divers of all levels. Notably, spider spawning occurs during the winter to spring months, while juvenile fish schools are prevalent in the summer to fall seasons. The entry to the site is from the shore, providing easy access for divers.

26.1323, 127.3041

Kuefu Island North

Kuefu Island North is part of the Chibisi group, which includes Kamiyama Island and Naganu Island, situated approximately 10 kilometers west of Naha City. The site is accessible via shore entry. Divers can expect to encounter a variety of marine life, including juvenile tens, stingrays, and red pine scorpionfish. The area is also home to red clams and a diverse range of invertebrates such as nudibranchs and sea snails. During the winter months, humpback whales can often be spotted from boats in the vicinity, migrating through the waters.

26.2519, 127.5599

Kujyukushima Islands

The Kujyukushima Islands, located in Nagasaki Prefecture, comprise a sea area with a high concentration of islands, extending 25 kilometers north of Sasebo Port. This dive site can be categorized into the nearby Kujuku Islands area and an expedition area. Divers can expect to encounter a diverse range of marine life, including various nudibranchs such as Sea Slug Nudibranchs and Sessile Nudibranchs. Other notable species include Leaf Shrimps, Blue Ribbon Fish, Blue Ribbon Goby, Squid, and Crabs. The entry to the dive site is from the shore, providing access to these rich underwater ecosystems.

33.2630, 129.5381

Kumanomi Paradise

Kumanomi Paradise is located approximately 5 minutes by boat from Maeganeku Port in Onna Village, Okinawa. This dive site is notable for its diverse marine life, featuring all six species of clownfish found in Japan. In addition to the clownfish, divers can observe garden eels, various sand-dwelling creatures, and symbiotic gobies, including screw-tailed and Yasha gobies. The site provides an excellent opportunity for anemonefish enthusiasts to explore a rich underwater ecosystem.

26.4409, 127.7776

Kumomi Ushitsukiiwa

Kumomi Ushitsukiiwa is a notable cave diving location situated along the Izu coast. It features numerous caves and overhangs located between two prominent rocks known as Ushitsukiiwa, positioned directly in front of the harbor. Divers can observe a variety of marine life, including soft corals that attract sea goldies and butterflyfish. At the offshore point, large schools of chicken grunts and sizable groupers, referred to as 'kue,' can be encountered. The site is accessible via a shore entry, making it convenient for divers to explore its underwater features.

34.7312, 138.7433

Kurima Beach

Kurima Beach, located on Kushima Island in Miyako, features a gentle sandy slope that reaches depths of approximately 6 meters. The area is characterized by coral heads and is home to a variety of marine life, including devilfish and clownfish. The site is accessible from the shore, making it suitable for beginner divers, training sessions, and night dives. It is generally diveable throughout the year, with the exception of periods of strong northerly winds.

24.7244, 125.2552

Kurohae

Kurohae is located in a National Park Special Protection Area and is known for its diverse marine life. The site features a significant number of fish species, including snappers, groupers, scorpionfish, and schools of rockfish. Additionally, divers may encounter amberjack, yellowtail, turtles, and occasional sightings of sharks, rays, frogfish, and flatfish. The underwater landscape includes a hard coral colony to the north and a large soft coral colony to the south, along with nannyo goatfish. Due to often strong currents, diving is best undertaken during favorable tide conditions. This site allows divers to experience a concentrated variety of marine ecosystems in one location.

32.9500, 132.4681

Kuroshima Nakamoto Cave

Kuroshima Nakamoto Cave, located on Kuroshima Island in Okinawa, features depths ranging from 10 to 23 meters and is characterized by gentle currents, making it suitable for beginner divers. The cave's unique topography and light conditions create an environment rich in marine biodiversity. Notable species include red clownfish, longnose dolphinfish, blue-spotted booby gobies, and various crustaceans such as the orangutan crab. This site provides an opportunity to explore both the stunning underwater landscape and the diverse marine life it supports.

24.2934, 123.9184

Kuroshima North Twin Rock

Kuroshima North Twin Rock is characterized by two prominent sea-exposed rocks and features a steep drop-off reaching depths of 50 meters. The site is notable for its diverse marine life, including large schools of migratory fish such as dogtooth tuna and bluefin tuna, as well as vibrant populations of snappers and goatfish. Additionally, divers may encounter turtles, sharks, and unique macro life such as Montski Frogfish and Pygmy Seahorses, making it suitable for divers of all experience levels.

26.2584, 127.4048

Kuroshima South

Kuroshima South is located on the southern side of Kuroshima in the Kerama Islands. This dive site features a beautiful coral reef and is known for potential manta ray sightings, particularly from October to November when the Nan'you manta may be observed feeding at the surface. While currents can be present, they are generally mild, making this site accessible for beginner divers. The reef is home to various marine species, including schools of grunts and anthias, as well as other fish such as the blue-green chromis, sleepy cod, and various types of clownfish. Encounters with sea turtles and ribbon eels are less common.

26.2455, 127.4037

Kuroshima V-Drop

Kuroshima V-Drop is located in Kuroshima, Taketomi Town, Okinawa Prefecture. This dive site features a dynamic drop-off with a distinctive V-shaped reef formation. The depth ranges from 5 meters to 30 meters, providing a habitat for various marine life. Divers can expect to encounter schools of manta rays, sea turtles, and migratory fish, particularly during the winter months. Along the drop-off, large schools of yellowtails and blue tangs are commonly seen, while the topography is home to longnose hawkfish and violet sea otters. Nudibranchs and lobsters can be found among the rocks, adding to the site's biodiversity.

24.2406, 123.9877

Kushimoto

Kushimoto, located at the southern tip of Honshu, is significantly affected by the Kuroshio Current, which brings a diverse range of tropical fish species from Okinawa and Izu. This area is recognized as one of Japan's prime fishing locations. Throughout the year, divers can observe the unique Azahata fish, along with fringed shrimp, nudibranchs, and jawfish. During the winter months, larger species such as razor sharks, spiny stingrays, and common spiders become more prominent. The site is accessible via shore entry, making it convenient for divers.

33.4746, 135.7713

Kyam Misaki

Kyam Misaki, located near Kyabu Cape Lighthouse in Okinawa, features dramatic topography with 30-meter cliffs. This dive site can be accessed from the shore and includes various underwater formations such as arches, caves, and crevices. Divers can expect visibility ranging from 20 to 30 meters, with opportunities to observe a variety of marine life including migratory fish, sea turtles, nudibranchs, and large tropical species like mud rays and tropical fish. The underwater landscape also includes drop-offs and tunnels, making it a diverse environment for exploration.

26.0764, 127.6694

L Arch

L Arch, located on Irabu Island, features a prominent L-shaped arch that descends to depths of 35 meters. This site is suitable for intermediate divers and above, offering opportunities to encounter various marine species including giant jacks, dogtooth tuna, rays, and sharks. Additionally, macro life such as pygmy seadragons, nudibranchs, and gobies can be found in the nearby Warp Hole cave, which is characterized by dynamic underwater topography.

24.8656, 125.1610

Legare-J Underwater Studio

Legare-J Underwater Studio, located in Ginoza, Okinawa, serves as an innovative underwater photography venue. This site is designed to accommodate non-swimmers and features an underwater studio equipped with night lighting and sound capabilities. It is suitable for various creative activities, including events, photoshoots, and commercial photography. The entry to the site is from the shore, making it accessible for divers and photographers alike.

26.4805, 127.9733

Lighthouse

Lighthouse, located under the Lighthouse in Abaren on Tokashiki Island, Okinawa, features a varied underwater landscape with clear visibility. The site includes drop-offs, caves, and an array of soft corals. Marine life is abundant, with sightings of green turtles and schools of snapping turtles. The dive site is primarily suited for intermediate divers, although beginners can participate in calmer conditions. Divers can explore a crevasse past a small rock base, where red lionfish, blue-spotted coral, kokuhan arabesque, table corals, and various reef fish can be observed.

26.1501, 127.3440

LOG Mae

Log Mae, located in Echizen, Fukui, is a shore-entry dive site with depths reaching up to 23 meters. The site features dynamic underwater structures such as Ebisu Channel, arches, and roots. Divers can encounter a variety of marine life, including schools of horse mackerel, amberjack, and over 200 species of nudibranchs. Additional sightings may include barracuda, yellowtail, juvenile southern spotted octopus, seahorses, and various crustaceans. The site is suitable for divers of all experience levels.

35.9570, 135.9775

Long Beach

Long Beach is situated along the coast, featuring a sandy beach that extends to the right. Access to the dive site is via a shore entry, which involves a brief walk while carrying diving gear. The beach area is spacious and offers ample parking; however, it lacks restroom facilities. Underwater, divers can explore various caves, abundant marine plants, and small fish. The presence of Mizukurage is common, and divers are encouraged to search along the rock formations for interesting marine life. This site provides a rich environment for exploration.

42.9183, 140.3906

Maeda Kikumaru Buoy

Maeda Kikumaru Buoy, located in Onna Village, Okinawa, is a boat-entry dive site situated near the well-known Blue Cave. The site is characterized by clear waters and a diverse array of marine life, including large schools of blue corals and black anemonefish. Divers can expect to see turtles throughout the year, along with seasonal schools of crucian carp during the summer months. The area also hosts various macro life, such as shrimp, crabs, and juvenile leatherback turtles.

26.4436, 127.7735

Maeda Point

Maeda Point is a popular dive site near Okinawa Island with depths ranging from 6 to 18 meters (20 to 60 feet). Divers can expect to see various marine life, including lionfish, clownfish, batfish, and octopuses. Visibility is typically around 20 meters (70 feet), but conditions can be rough on some days, so check before diving.

26.4433, 127.7743

Maeda Sentan

Maeda Sentan, located at the tip of Cape Maeda in Onna Village, Okinawa, features a dive site that reaches depths of 16 meters. The area is characterized by long, narrow roots that support a variety of reef life within a well-preserved ecosystem. Divers can observe schools of snappers and goatfish, along with reef species such as clownfish and butterflyfish. Additionally, macro life including nudibranchs and crustaceans can be found, as well as occasional sightings of turtles and jacks. The site is less frequented than the nearby Blue Cave, providing a tranquil diving experience.

26.4452, 127.7723

Maguroana

Maguroana is located on Yomejima, the southernmost island in the Keita archipelago, approximately 50 km from Chichijima. This dive site features a unique rock formation known as the Arc de Triomphe, which is partially submerged. Divers can expect to see large congregations of bluefin tuna, with numbers sometimes exceeding 100 individuals. Additionally, bluefin crocodiles are frequently observed in the area. When venturing offshore, divers may encounter large schools of various fish species, including the blue-and-white crested woodpecker and the black-headed coral reefer. The site also has a notable frequency of hand dolphin sightings, which can be observed from the surface or during dives.

27.4854, 142.2066

Makiminato

Makiminato is a shore diving site located in Urasa City, Okinawa. Access to the site is convenient, with parking available along the coast and a staircase leading directly to the entry point. Divers can follow a guideline that extends out to the reef. The area is known for its beautiful soft corals, and during the winter months, there is an abundance of macro marine life. Commonly observed species include nudibranchs, banded sea snakes, clownfish, gobies, surgeonfish, pufferfish, butterflyfish, wrasses, damselfish, octopuses, and cuttlefish, particularly near the soft corals and sandy areas. The site is suitable for relaxed diving, with night dives recommended for observing crustaceans.

26.2756, 127.7148

Manta City Point

Manta City Point, located near Kabira-Ishizaki on Ishigaki Island, is recognized as a prominent cleaning station for manta rays. The dive site features depths ranging from 5 to 25 meters, making it accessible for divers of all experience levels. In addition to manta rays, divers can encounter various marine species including turtles, Napoleon fish, giant cuttlefish, gurukuns, and other large fish. Access to the site is via boat, providing a convenient entry point for divers.

24.4882, 124.1186

Manta Ray Scrumble

Manta Ray Scrumble is situated on the northwest side of Ishigaki Island and is renowned for its high frequency of manta ray encounters. Accessed by boat within 10 to 15 minutes, the dive site features a depth range of 10 to 20 meters. The site includes a small underwater hill that serves as a cleaning station for manta rays, which typically swim at depths of 5 to 10 meters, making it possible to observe them while snorkeling. In addition to manta rays, divers can also find clownfish, which spawn periodically and protect their eggs, as well as flounder, red snapper, and pike. Macro life such as snail crabs can also be spotted in this area.

24.4829, 124.1291

Manzamo

Manzamo, located in Onna Village, Okinawa, features a vertical dive known as Manza Dream Hole, which ranges from depths of 5 meters to 30 meters. This site is characterized by its unique topography and is home to a variety of marine life, including clownfish, snappers, and alewife’s toothfish. Divers can also observe an array of macro life such as nudibranchs, anemone crabs, and isopod crabs, making it a year-round destination for both novice and experienced divers. The entry to the site is from the shore.

26.5044, 127.8434

Marine Center Front

Marine Center Front is accessible from the shore and features a sloped terrain that requires caution when handling equipment to prevent falls. During low tide, rocks become exposed at the entry point, so it is advisable to dive during high tide when the waters are calm and shallow, facilitating easier diving. Divers should be mindful of coral clusters and maintain neutral buoyancy while exploring the area. At a depth of 5 meters, divers can encounter schools of mullet and whitebait, along with the well-camouflaged Kaikamuri crab. Additionally, sightings of pufferfish, damselfish, and potentially frogfish are possible in this underwater environment.

33.4730, 135.7724

Marine Lake

Marine Lake, located on Shimoji Island in Okinawa, is a distinctive dive site that connects to the ocean through underwater passages. This site is appropriate for both beginner and intermediate divers. It features a cave route that leads to a surface pond, where beams of light penetrate the ceiling, creating a unique visual effect. The marine life includes red lionfish, southern moray eels, and Japanese parrotfish found in the caves, along with small freshwater fish, shrimp, and various brackish-water species in the pond's freshwater area.

24.8104, 125.1418

Masakijima

Masakijima is a small island located in Ago Bay, Mie Prefecture, accessible by a 10-minute boat ride from Kintetsu’s Kenshima Station. The site features calm and clear waters with a maximum depth of 10 meters, making it suitable for snorkeling and beginner divers. The gentle conditions are ideal for families and entry-level divers throughout the year. Marine life includes colorful species such as Solas Pollack and butterfly fish, with seasonal appearances of red barracuda and blue-finned dace during the summer and fall, enhancing the experience for novice divers.

34.2869, 136.8081

Mermaid’s Grotto

Mermaid’s Grotto, also known as Apogama, is located in Onna Village, Okinawa. This site features a prominent natural cave characterized by a heart-shaped hollow. The dive reaches depths of up to 35 meters and includes a network of underwater tunnels and arches that create interesting topographical features. Divers can expect to encounter a variety of marine life, including lance fish, yellowfin seabream, dogtooth tuna, giant trevally, lobsters, nebrids, and the occasional sighting of turtles or barracudas. The entry to this site is from the shore.

26.4986, 127.8420

Michelin Mishiragi

Michelin Mishiragi is characterized by its varied underwater landscape, featuring half drops, arches, and crevices. The site is home to large sea fans and isobranchs, which provide shelter for goatfish. Notable marine life includes large species such as giant trevally, Napoleon wrasse, and giant grouper. Divers may also encounter Bumphead grouper, sea turtles, and occasionally, seasonal rarities like frogfish and pygmy seahorses. Commonly seen species include Pseudobagrus ichikawai and Scorpionfish, along with various wrasses, butterflyfish, and sea otters. The dive site is accessible from the shore.

26.4403, 127.7245

Miho

Miho is a dive site located near Miho no Matsubara, characterized by a gravel beach entry. Divers can descend along a gentle slope reaching a depth of 5 meters, followed by a steep drop-off that extends down to 18 meters before leveling out. The sandy areas are home to various marine life, including sea horses, frogfish, and rare gobies. During winter months, divers may observe the spawning behaviors of red snapper and rusty goby, while summer brings bluefinches to the area for their own spawning activities. Additionally, a nearby river provides opportunities to witness a salmon run.

35.0208, 138.5188

Mikuni Takara Island West

Mikuni Takara Island West, located near Bikuni Port in Shakotan, Hokkaido, is accessible by boat within a 5–10 minute ride. The site is characterized by its clear waters, often referred to as 'Shakotan blue,' and features a variety of underwater landscapes including columnar joints, crevasses, and tunnels. Marine life at this site includes species such as mebaru, soi, and sculpin, along with migratory yellowtails and flounders. Divers may also encounter schools of sea tanago and a diverse array of nudibranchs among the rock and coral ecosystems.

43.3086, 140.5990

Mikurajima Island

Mikurajima Island is home to over 200 wild dolphins, offering a unique opportunity for skin diving to interact with these marine mammals. Scuba diving is not permitted at this site. Visitors can access the dolphins by landing on the island and approaching them via a small boat. While this location is recognized as one of the prime spots in Japan for swimming with wild dolphins, encounters are not guaranteed. The dolphins are individually identified and are under strict protection, meaning they cannot be touched during interactions.

33.8991, 139.5917

Minami Echizen

Minami Echizen is located approximately 10 kilometers south of Echizen and is a relatively new diving area. It is easily accessible from the Kansai and Chubu regions, attracting many divers. The site features over 20 dive locations accessible from the shore. Marine life includes seasonal visitors such as sardines and horse mackerel in the summer, while autumn brings the appearance of Echizen and Mizudako jellyfish. Year-round, divers can observe various species including dandelions, sea horses, nudibranchs, and groupers.

35.8337, 136.0561

Minami Ise

Minami Ise, located in Mie Prefecture, features a rias coastline characterized by calm inner bays that are suitable for beginner divers and macro enthusiasts. The site is also known for its dynamic terrain and soft corals in the open ocean, appealing to those interested in wide-angle photography. The marine life includes year-round populations of snappers and mackerels, with seasonal appearances of frogfish and nudibranchs in spring, and rockfish in early summer. The site can be accessed from Nagoya or Osaka within 2 to 3 hours, making it convenient for day trips.

34.3199, 136.6594

Mini Grotto

Mini Grotto, located on Shimoji Island in Okinawa, features a cave dive characterized by an underwater tunnel that leads to a concealed pond. The maximum depth at this site is 20 meters, making it accessible for divers of all experience levels. Natural light illuminates the cave, enhancing visibility. The return path includes a notable landmark known as 'Bent’s Mark,' which adds an element of exploration. Marine life at Mini Grotto includes horse mackerel, snappers, and various sand-dwelling species such as sea eels and seahorses, along with mimic species like razor fish and armadillo fish.

24.8218, 125.1367

Mitate Wreck

The Mitate Wreck is located on Sado Island, which is accessible via a ferry from Niigata Port in approximately 2.5 hours or by jetfoil in about 1 hour. This dive site is characterized by calm and clear waters during the summer months, with higher water temperatures that enhance visibility. Divers can expect to encounter large schools of horse mackerel and sea bream, along with mebals and chagarras. The area is also home to kobudai, moss dippers, and various anemones. Notable behaviors such as the spawning of spoonbills and octopuses can be observed here, adding to the site's ecological interest. The entry to the site is from the shore, making it accessible for divers looking to explore the wreck and its surrounding marine life.

38.3011, 138.5137

Mitsune

Mitsune is located on the northern side of Mikomoto Island, where divers can observe the effects of both low and high tides. The site features three distinct root formations, with the western side characterized by a flat, gradual descent, while the eastern side presents a cluster of roots. This area is known for seasonal migrations of hammerhead sharks and other shark species, making it an important habitat for these marine animals.

34.5767, 138.9393

Miyagi Channel

Miyagi Channel is located four minutes east of Tobara Port and features a deep cut between Miyagi and Heianza Islands. The mooring is situated at a depth of 8 meters, with depths exceeding 30 meters accessible for divers. Visibility typically ranges from 20 to 30 meters, and can improve under favorable conditions, making it suitable for experienced divers. The site is characterized by diverse coral formations and offers opportunities to observe larger marine species at depth. Near the mooring area, schools of goat fish are frequently spotted.

26.3498, 127.9941

Mizugama

Mizugama, located in Kadena, Okinawa, is a dive site accessible year-round from the shore. The site features a sandy bottom with depths reaching up to 10 meters, making it suitable for beginner divers, while also offering deeper drop-offs for more advanced divers. The underwater landscape includes lush soft corals and a notable underwater cave. Marine life at Mizugama includes clownfish, Yasha gobies, frogfish, and various shrimp species such as suzakusakura and cubensis. The site remains diveable even in conditions with north winds.

26.3599, 127.7385

Mogurin

Mogurin, located in Onna Village, Okinawa, features depths ranging from 5 to 30 meters, making it suitable for beginner divers. The site is known for its diverse marine life, including butterflyfish, clownfish residing in giant anemones, and resting white tip sharks near the drop-off. Additionally, divers may encounter snappers, whiptail shrimp, glass gobies, and larger species such as green turtles. This site serves as a quieter alternative to the more frequented Blue Cave.

26.4414, 127.7763

Motosuko Lake

Motosuko Lake, located at an altitude of approximately 900 meters, is the deepest of the Fuji Five Lakes, reaching a maximum depth of 122 meters. This freshwater diving site is recognized for its unique aquatic environment. Divers can expect to see various species such as black bass, Magoi, and Nishikigoi congregating around submerged giant trees. Additionally, catfish, woodpeckers, sailfish, and nuthatches can be observed at the lake's bottom and among the rocky areas. Diving here requires adherence to altitude diving procedures due to the elevation.

35.4651, 138.5884

MTK Beach

MTK Beach is situated on the eastern side of the Kii Peninsula, providing convenient access from both the Kansai and Chubu regions. The dive site is located within Guki Bay, characterized by a long and narrow cove where the sea conditions are generally calm. The underwater environment is rich with hard corals, including green reefers and various blue and white corals. The sandy substrate supports a diverse population of goby species, while anemones host numerous shrimp. Divers can expect to encounter larger marine life such as yellowtail, grouper, korodai, sharks, stingrays, and sea turtles with a high likelihood of sightings.

34.0137, 136.2472

Nagannu North

Nagannu North is located approximately 30 minutes by boat from Naha, situated to the north of Nagannu Island in the Chibishi Islands. This dive site features a drop-off along which divers can explore. The reef is home to various fish species, including Anthias and Butterflyfish, while the deeper waters host larger pelagic species such as Bluefin Trevally and Grey Reef Sharks. Additionally, divers may encounter Green Sea Turtles, Clownfish, and several types of rays, including the Spotted Eagle Ray and Manta Ray. The site offers a diverse marine ecosystem, making it suitable for divers seeking to observe a variety of marine life.

26.2751, 127.5488

Nagannu South

Nagannu South is located on the southern side of Nagannu Island, approximately 30 minutes by boat from Naha. This dive site features a mix of coral and sandy bottom, providing a relaxed diving experience. The depth ranges from 5 to 20 meters, making it accessible for divers of various skill levels. Marine life commonly observed here includes green sea turtles, clownfish, and various species of wrasse. Additionally, divers may encounter spotted eagle rays and sleepy sharks on occasion.

26.2636, 127.5445

Nagaragawa River

The Nagaragawa River is recognized as one of Japan's three major clear streams, characterized by its high water clarity. The typical depth ranges from 3 to 6 meters, with certain areas exceeding 10 meters. In the upper sections, divers can observe rainbow trout and rockfish, while the middle reaches are populated with large numbers of ayu and catfish. Additionally, rare species such as the stone-like Ayu salmon and sea trout can be found here, along with the Japanese Green Turtle and Mokuzu crab.

35.5523, 136.9106

Nagashima Kaiba 1

Nagashima Kaiba 1 is located at Cape Shakotan, the northernmost point of Shakotan in northwestern Hokkaido. This site is part of Hokkaido's only underwater park and is recognized for its sandy beach. Divers can expect to see various marine life, including schools of headliners and bowhead whales, which can reach lengths of 12 to 3 meters, typically observed from June onwards. Additionally, killer whales may be spotted in April. Tuna sightings are common around September. The entry to the dive site is from the shore, making it accessible for divers.

43.3547, 140.5290

Nagura Coral Garden

Nagura Coral Garden, located in Nagura Bay on Ishigaki Island, is recognized for its exceptional coral diversity and density. The site features a variety of coral formations, including table corals, and is characterized by calm currents and clear waters, making it suitable for divers of all experience levels. The optimal time for diving here is from May to October, when visibility is at its best. The marine life includes species such as sparrowhawks, red-eyed gobies, mangroves, and Mikazuki shrimp, all thriving among the coral reefs and sandy areas.

24.4305, 124.1186

Nakachiburu

Nakachiburu, located near Tokashiki Island in the Kerama Islands, is a dive site suitable for beginners with a maximum depth of 10 meters. The underwater landscape features a mix of sandy patches and roots. Divers can observe scorpionfish hiding in crevices, while clownfish inhabit purple anemones. The site experiences low currents, making it ideal for night dives. Notable marine life includes red bee gobies and turmeric snails, along with various symbiotic crustaceans.

26.1587, 127.3450

Nakagurumi

Nakagurumi is characterized by scattered reefs situated on sandy substrates, where water flow is typically low, leading to reduced visibility. Divers are advised to utilize a rope for their descent and to manage their buoyancy and fin movements carefully to minimize sand disturbance. The site reaches a maximum depth of approximately 10 meters and contains small tunnels. Currents are generally weak, making it accessible for divers. Marine life commonly observed includes schools of spotnape cardinalfish and lionfish, along with juvenile yellow boxfish, which are often favored by divers.

33.4644, 135.7679

Nakanoshima Channel

Nakanoshima Channel, located on Shimoji Island in Miyako, features depths ranging from 5 to 25 meters with generally calm currents, making it accessible for divers of all experience levels. The site is characterized by a network of crevasses, arches, and tunnels that create impressive light patterns on clear days. Marine life includes clownfish, snappers, nudibranchs, crabs, shrimp, juvenile jawfish, and Ovicennia japonica, providing a rich macro environment for exploration.

24.8130, 125.1430

Nakanoshima Hole

Nakanoshima Hole, located on Irabu Island, features a unique underwater topography where divers enter at a depth of 5 meters and descend into a 25-meter deep hole. This site is characterized by notable light and shadow contrasts. It faces the open ocean, which can result in strong currents, making it more suitable for intermediate to advanced divers. Marine life commonly observed here includes schools of red clownfish, passing manta rays, pygmy seahorses, Nichirin datydids, nudibranchs, clownfish, and southern scorpionfish.

24.8123, 125.1428

Nakayukui

Nakayukui, derived from the Okinawan dialect meaning 'a break', is characterized by its coral reefs and white sandy bottom. The site typically has minimal current, making it suitable for relaxed diving experiences. Divers can observe a variety of fish species and green sea turtles on the reef. During winter months, the sandy areas are particularly rich in macro life, providing excellent opportunities for observation. This site is recommended for those looking to enhance their skills or engage in leisurely biological observation.

26.5084, 127.8821

Namerikawa

Namerikawa is accessible via a beach entry from a gravel shoreline. As divers descend, they will encounter Gorota stones, transitioning into sandy areas further offshore. The depth increases gradually, reaching over 40 meters. The site is located in the Sea of Japan, which is known for its unique marine life, including Baldwin's shrimp, various squid species, octopus, dandelion fish, whitefish, and anglerfish, which are typically found in deeper waters.

36.7784, 137.3453

Nami no ue Seaside

Nami no ue Seaside is located at Umino-Umizura Park in Naha, approximately 15 minutes from the airport. This site features a calm bay with a depth of 5 to 6 meters, making it suitable for beginners and families. The area is equipped with changing rooms, hot showers, and lockers, providing a safe environment for diving and snorkeling. Marine life includes tropical species such as sparrowhawks, clownfish, horned fish, and butterfly fish, along with the rare Western Hemigrammocypris.

26.2210, 127.6660

Naruhodo The Cave

Naruhodo The Cave, located in Shimojishima, Miyakojima, is a dive site that reaches a depth of 15 meters and is suitable for beginners. The site features a unique doughnut-shaped structure, with sunlight filtering through cracks in the ceiling, enhancing visibility. Divers can observe a variety of marine life, including red clownfish, dolphinfish, nudibranchs, anemonefish, and snappers both inside and outside the cave.

24.8048, 125.1481

Nazumado

Nazumado is located on the western side of the island, directly facing Hachijo Kojima. This dive site features a unique setup with ropes that assist divers in entering and exiting a walled reef that descends steeply. Divers can observe a significant population of sea turtles, which are known to approach closely without fear. In the spring, a diverse range of nudibranchs can be spotted, varying in size from small to large. The site is also home to Juuzen, a butterfly fish species endemic to Hachijo Island and the Ogasawara Islands, which can be seen as juveniles. During the spring, these fish gather to spawn, along with the rare Juuzen Tama. Additionally, Lenten sea otters, from juveniles to adults, can be observed in this area.

33.1460, 139.7390

Nebukawa

Nebukawa, located in Odawara City, Kanagawa, is an underwater archaeological site that features the remnants of the former Nebugawa Station, which was submerged due to the Great Kanto Earthquake. The site is influenced by the Kuroshio Current, supporting a diverse range of marine life including schools of snappers, green sea fans, moss blennies, mantis shrimp, sea turtles, frogfish, dungfish, and various nudibranchs. The entry is from the beach, making it accessible for divers of all experience levels.

35.2009, 139.1396

Nishibama

Nishibama, located on the west side of Aka Island in the Kerama Islands, is a notable dive site accessible from the shore. The area is known for its diverse marine life, including close encounters with groupers and a variety of colorful fish such as yellow-flanked snappers, Keramana flounders, and Debus damselfish. The coral formations are visually striking, providing habitat for species like red-eyed shrimps, Shiroboshi seagull shrimps, and blue-eyed angelfish. This site offers a rich underwater experience for divers exploring the vibrant ecosystem.

26.2025, 127.2889

Nishikawana

Nishikawana is situated at the tip of Tateyama on the Boso Peninsula. This dive site is accessible only by boat and features a maximum depth of 25 meters, with an average depth ranging from 15 to 16 meters. The underwater landscape consists of rocky reefs, gorota stones, and sandy areas. Divers should be cautious as currents can be swift at times. The site is known for its diverse marine life, including large fish such as Kue, schools of sunfish, and damselfish. During the summer months, schools of stingrays can be observed, along with a notable black sea eel that resides in the area. Additionally, large migratory fish are often seen chasing smaller fish in the summer season.

34.9624, 139.7587

Nishiumi

Nishiumi is situated at the southwestern edge of Ehime Prefecture, adjacent to Kochi Prefecture, near the West Sea Peninsula and southwest of Aina Town. While boat diving is the primary method of exploration, divers can also access the site via the beach. The marine life includes semicirculated angels, red Anthias, red-headed snapper, Keramahana snapper, scorpionfish, various frogfishes, rainbow runners, and jacks. Notably, Bullshead Sharks are commonly observed during the months of May and June.

32.9485, 132.5000

Nita Cave

Nita Cave, located on Zamami Island, features a complex underwater landscape with various caves and tunnels illuminated by natural light. This site is characterized by the presence of large schools of longnose hawkfish, along with other marine species such as shrimp, crabs, and moray eels, which can be found among the rocky terrain. The dive site is suitable for intermediate divers, offering unique visual experiences with light curtains and blue cave formations. The entry to the site is from the shore.

26.2368, 127.2879

Noa Front Beach

Noa Front Beach offers shore access for divers looking to explore the underwater environment. The site is known for its clear waters, often referred to as 'Susami Blue,' and is home to a variety of marine life. Divers can expect to see abundant nudibranchs and a range of macroscopic creatures, including anchovies, black-eyed clams, spotted gobies, and groupers. Additionally, schools of red clams and puffins can be observed, along with significant populations of dwarf dallions and sablefish, which can number between 500 to 1,000 individuals.

33.5479, 135.4861

Noris Osaka Diving Pool

The Noris Osaka Diving Pool, located in Chuo-ku, Osaka, is a heated training facility featuring depths of 1.2 meters and 4.5 meters. The pool is equipped with a mirrored wall that allows divers to assess their form and buoyancy, making it suitable for skill enhancement across various diving levels. The facility does not contain natural marine life; instead, it utilizes mannequins and obstacles for practice. Additionally, it offers filming opportunities for mermaid swim lessons, catering to different diving styles.

34.6738, 135.5116

Noris Pool

Noris Pool, located at 34.629200, 135.039300, features a 5-meter-deep training pool directly in front of the diving school, providing a controlled environment for divers of all skill levels. The site is part of the urban diving school Noris Kobe Maiko, which also offers access to Maiko Beach. This location allows for night dives and is situated near the Akashi Kaikyo Bridge, enhancing the diving experience with its unique urban backdrop. The area around the breakwater is known for its diverse marine life, making it suitable for both training and recreational diving.

34.6292, 135.0393

Noto Island

Noto Island is situated in the bay of the Noto Peninsula within Ishikawa Prefecture. Access to the island is possible by land via a bridge, but diving activities are conducted by boat at six designated dive points. The underwater environment features dense growths of seaweed, particularly Hondawara, which provides habitat for various marine life. Notably, large groups of mebals can often be observed among the seaweed. Additionally, there is a specific area where Kobudai are found living in a harem structure. The site is also rich in macro organisms, including moss dippers and nudibranchs, making it a diverse location for underwater exploration.

37.1431, 137.0496

Nozaki

Nozaki is located on the western side of Tokashiki Island, which is the largest island in the Kerama Islands. The dive site features beautiful shallow coral areas and offers encounters with green sea turtles. The maximum depth reaches approximately 25 meters, where divers can observe coral formations and a variety of fish species, including anthias and damselfish. This site is suitable for beginner to intermediate divers, although strong currents may occur during spring and neap tides.

26.2215, 127.3519

Nyanko Rock

Nyanko Rock is located approximately two minutes by boat from the West Sea, with an option for a 25-minute swim for those seeking a challenge. This site is typically chosen for the first dive due to its deeper average depth, making it suitable for deep diving training with depths reaching up to 40 meters. The marine life here includes various fish species such as snappers, groupers, scorpionfish, and schools of rockfish. Additionally, divers may encounter turtles, and occasionally sharks, rays, frogfish, and flatfish. Jawfish are particularly abundant in this area, enhancing the diving experience.

32.9522, 132.4998

Occhogahama

Occhogahama is located at the southwestern tip of the island and features a beach entry with dedicated stairs. The site is notable for a large cave that attracts various marine life, particularly numerous species of nudibranchs, including the Great Crested Nudibranch and Bob’s Sun Nudibranch. Inside the cave, divers can encounter creatures that thrive in dark environments, such as blue clams, lobsters, and sea turtles. Additionally, rare crustaceans like fritillary shrimps and snail crabs can be found hiding beneath the cavern at the cave's end.

33.0626, 139.7968

Ogan

Ogan is an uninhabited island located approximately 15 kilometers southwest of the southern tip of Iriomote Island, accessible by boat in about one hour. The dive site features the notable 'Eastern Root,' characterized by large hidden roots that emerge from the seafloor at a depth of 40 meters. This location is known for its strong currents, making it suitable for advanced divers. Marine life in the area includes blue tuna, red snapper, schools of hawks and bluefish, as well as yellowtail, bluefin tuna, bluefin trevally, Napoleon fish, and blackfin barracuda. Whale sharks have also been observed here.

24.1930, 123.5631

Ogi Port

Ogi Port, located on southern Sado Island, features diverse marine life and varied underwater topography. A notable point at this site is the 'Happy Jizo,' where a Jizo statue is situated at a depth of 23 meters. Divers often leave coins at this statue as part of a safety prayer ritual. The area includes drop-offs and reef zones, making it appealing for those interested in underwater formations. Marine species commonly observed here include snappers, mebals, nudibranchs, anemones, and seasonal cephalopods such as squid and octopus.

37.8146, 138.2802

Ohoba No.1 Crevasse

Ohoba No.1 Crevasse is located on Iejima, a remote island in northern Okinawa, accessible via a 30-minute car ferry from Motobu Port. This dive site features a unique underwater landscape characterized by domes and caves. Divers can encounter a variety of marine life, including the giant flying fish, red-headed coral fish, and red-headed frogfish. The area is also home to goblins, red pine scorpionfish, turmeric clams, and various pygmy goblins. Along the drop-offs, divers may observe flounder, spiny dogfish, and Napoleon fish. The site is primarily a shore dive, allowing for easy access to the underwater features.

26.7270, 127.8401

Oike

Oike, located in Aigaura, Minami Ise, is a unique marine lake with a maximum depth of 7 meters, making it suitable for beginner divers and training purposes. The site is abundant in macro marine life, including Satsuki and Tatsu gobies, as well as Chagara and blue sea urchin nudibranchs. Divers may also encounter larger fish species such as Kaiwari and barracuda, providing a range of underwater experiences. The nearby boat sites enhance the diversity of marine life, featuring schools of whitebait and additional nudibranchs.

34.2962, 136.6512

OK Marine Pro

OK Marine Pro is located a short 4-minute walk from Nerima Station. The facility features a diving pool with two distinct depths of 1.2 meters and 5 meters, allowing for varied practice opportunities. The first and second floors are dedicated to the diving pool, while the third floor serves as the information and reception area. An elevator is available for direct access to the third floor.

35.7351, 139.6568

Okinose W Arch

Okinose W Arch is located on the Etchu-Miyazaki Coast at the eastern edge of Toyama Prefecture, approximately 1 kilometer from the shore and facing the open ocean. The site features two adjacent arches, a rare geological formation in the Sea of Japan. The depth at this site is around 15 meters, and divers may encounter strong currents, particularly in certain conditions. The underwater environment supports a variety of marine species, including big snappers, amberjack, yellowtail, sunfish, and various nudibranchs such as yellow-bellied and white nudibranchs. The presence of an ancient shrine in the area contributes to its local significance as a power spot. Clear water conditions are typical from spring through summer, making it a notable dive location.

36.9827, 137.5902

Okinoshima Island

Okinoshima Island is part of the Oki Islands, an archipelago consisting of four inhabited islands located off the Shimane Peninsula. The site is characterized by its dynamic terrain and is influenced by the warm Tsushima Current, which attracts various migratory fish species. Divers can expect to see large schools of yellowtail and Hiramasa, as well as notable marine life such as black rockfish and the endemic Okimatsuge. Additionally, large flathead mackerel, barracuda, and jellyfish can be observed in the waters around the island. The entry to the dive site is from the shore, making it accessible for divers looking to explore the underwater ecosystem.

36.2056, 133.3302

Okinoshima Island

Okinoshima Island is situated approximately 70 kilometers north-northwest of Fukuoka City and was designated as a World Heritage Site in 2017. Access to the island is exclusively by boat, with a travel time of around two hours. The dive site features diverse marine life, including large schools of sea squirts, hawks, and hawk eels. Divers can also encounter significant migratory species such as Hiramasa and kangpachi. The underwater landscape is characterized by vibrant soft corals, where red snapper and yellow snapper can be observed swimming among them.

34.2402, 130.1004

Okirai Namiita Beach

Okirai Namiita Beach, located in Ofunato, Iwate, features calm and shallow waters ideal for beginner divers. The site is characterized by seasonal changes and ongoing restoration of seaweed beds, which support a diverse array of marine life. Notably, it is home to both northern and southern species, contributing to its rich biodiversity. Marine life includes lingcod, croaker, sculpin, gibbon, sea slugs, ameflagellates, crabs, and shrimp, all thriving within the seaweed forest ecosystem.

39.1088, 141.8296

Okubo Hama

Okubo Hama is situated in the northern region of Miyakejima and is accessible only via a beach entry. The underwater landscape is characterized by lava formations that extend into the sea, with roots visible offshore. The dive site offers a significant area to explore both to the east and west, but divers cannot complete a full circuit in a single dive. The site is notable for its diverse macro life, including the presence of Japanese Pygmy Seahorses. Along the walls of the lava roots and in the shallow waters above, a variety of marine organisms can be observed. A prominent overhang provides habitat for numerous scorpionfish, and sea turtles are frequently spotted in the shallower areas.

34.1218, 139.5164

Omi-Maiko Nakahama Beach

Omi-Maiko Nakahama Beach is located on the west shore of Lake Biwa in Otsu, Shiga. This site is notable as the only diving location in the prefecture, providing clear waters that are suitable for both beginners and experienced divers. The dive site allows for encounters with various freshwater species, including ayu, black bass, bluegill, prawns, and mokuzu crabs, along with a variety of aquatic plants. The entry to the dive site is from the shore, making it accessible for divers looking to explore the unique freshwater environment.

35.2310, 135.9634

Omijima Island

Omijima Island is a shore dive site located at coordinates 34.426600, 131.224600. The area is known for its diverse marine life, including over 100 species of nudibranchs, various coral reef fish, cuttlefish, and dwarf gobies. The site is particularly notable in early summer for the presence of Steller’s sea eagles and the unique phenomenon known as the Battle of the Great Crested Willows. The conditions at this site allow for consistent diving opportunities, as weather-related cancellations are infrequent due to the geography of the island and its surrounding waters.

34.4266, 131.2246

Onna Point

Onna Point, located in Onna Village, Okinawa, features clear waters and a diverse range of marine life. The dive site includes intricate channels that vary in depth from 3 to 18 meters. Near the 'Apogama' cave, the shallow areas are covered with vibrant hard corals, providing a rich habitat for various species. Divers can expect to see schools of snappers throughout the year, along with seasonal appearances of yellowtails and wrasses. Additionally, macro life such as Japanese snow fish, crocodile fish, and red-spotted lobsters can be observed in this area.

26.4982, 127.8419

Orange Forest

Orange Forest, located in Minami Ise, Mie, is a boat-access dive site with a maximum depth of 22 meters. The site is characterized by clear waters and is home to various marine species, including schools of yellowtail and bluefin squid. Divers may also encounter hammerhead sharks. In deeper sections, macro life such as Ayatolla and Xanthocorallis clownfish, as well as blue-spotted and yellow coral clown shrimp, can be observed, making it suitable for both wide-angle and macro photography.

34.2956, 136.6663

Osaki Akakukuri no Ne

Osaki Akakukuri no Ne, located on Ishigaki Island, features depths ranging from 10 to 20 meters. Divers can expect to see large schools of red clownfish near the roots, as well as common sightings of giant trevally, dogtooth tuna, and green turtles. The area is rich in marine life, including snappers, bluefin trevally, giant jacks, yellowfin tuna, and barracuda. Additionally, macro life such as nudibranchs and shrimp can be found among the roots, which provide an interesting topography for exploration.

24.4129, 124.0851

Osaki Hanagoi Reef

Osaki Hanagoi Reef, located in Ishigaki, features depths ranging from 5 to 35 meters and showcases a variety of underwater terrain. The shallower areas are characterized by bright yellow corals and are home to schools of red snappers. Notably, spawning activities can be observed in early spring. The reef supports a diverse array of marine life, including rare gobies, bumphead parrotfish during spawning, turtles, minnows, clownfish, and occasional sightings of manta rays. This site is accessible from the shore and is suitable for divers of all experience levels throughout the year.

24.4234, 124.0747

Osaki Minokasago Kyuden

Osaki Minokasago Kyuden, located in western Ishigaki, features underwater roots that rise from the sandy bottom at depths ranging from 5 to 30 meters. This site is home to various marine species, including schools of scorpionfish and leaf scorpionfish. In the shallower areas, divers can observe schools of snapper, while the sandy bottom is inhabited by garden eels and gobies. The presence of yasha and hiretta gobies, along with jawfish and sea turtles, adds to the site's biodiversity, making it a notable location for divers.

24.4210, 124.0777

Overhead Rock

Overhead Rock is a diving site located near Manza Beach, characterized by a drop-off that begins at a depth of approximately 5 meters. The area is known for its vibrant coral formations and frequent sightings of green sea turtles. At depths between 30 to 40 meters, divers may encounter large species such as giant trevally. The site offers a diverse range of marine life, including species like the ornate ghost pipefish, pygmy seahorses, and various types of butterflyfish. The entry to the site is from the shore, making it accessible for divers looking to explore its underwater features.

26.5114, 127.8560

Owase

Owase is situated on the eastern side of the Kii Peninsula, providing convenient access from both the Kansai and Chubu regions. The area features a rias-style coastline with complex terrain and several islands that serve as key points of interest for divers. The site allows for shore entry, making it accessible for divers. Marine life is abundant, with sightings of large yellowtail, mejina, black-eyed fish, and sizable groupers. During the summer to autumn months, tropical species such as clownfish, honeycomb damselfish, hornbills, and bluefin damselfish can also be observed. Additionally, divers may encounter larger species including sting sharks, cat sharks, large stingrays, and sea turtles.

34.0657, 136.2448

Oyashirazu

Oyashirazu is located at the boundary of Toyama and Niigata prefectures. The dive site features a cliff at Oshirachi Beach that faces the open ocean, providing good visibility that can exceed 20 meters from June to September. The underwater terrain includes numerous large roots, rocks, arches, and crevasses, offering diverse exploration opportunities. During the fall, divers can observe many juvenile fish, along with seasonal nudibranchs. Additionally, larger marine life such as 1-meter class yellowtail and lobsters can be encountered, allowing for both macro and wide-angle photography.

37.0059, 137.7328

Panari Big Corner

Panari Big Corner is located south of Aragusuku Island in Okinawa and is recognized as a notable site for manta rays, having been identified in 2016. The dive site features shallow cleaning stations at approximately 5 meters, making it accessible for beginner divers, although strong currents can occur. Divers may encounter various marine life, including manta rays, black manta rays, dogtooth tuna, barracuda, Napoleon fish, schools of snappers, sea turtles, and nudibranchs.

24.2140, 123.9445

Paraiso

Paraiso is located on the western side of Maejima in the Kerama Islands. The site features a sandy bottom with white sand that extends from the coral reef to deeper waters. The area is suitable for divers of all levels, including opportunities for drift diving. Marine life commonly observed here includes species such as the Kihoshi damselfish, sleeping reef sharks, spotted rays, green sea turtles, southern flounders, and various anemonefish. The coral formations are vibrant, providing habitat for numerous small fish, making it an engaging dive site.

26.2223, 127.4482

Pineapple Rock

Pineapple Rock, located in Minami Ise, Mie, is accessible by boat and features depths reaching 16 meters. The site is characterized by a prominent pineapple-shaped root that attracts various marine species, including schools of snappers, butterflyfish, and resting dorado sharks. Divers can also observe nudibranchs, turtles, rays, smelt, and winter anglerfish, as well as diverse life in the rock crevices and benthic zones. Visibility typically ranges from 15 to 17 meters, making it suitable for divers of all experience levels, particularly those interested in topography, macro, and wide-angle photography.

34.2984, 136.6632

Pink Marlin Buoy

Pink Marlin Buoy, located in Onna Village, Okinawa, is a dive site accessible from the shore. It is known for the nearby 'Blue Cave,' where sunlight creates a notable blue illumination. Divers can surface inside the cave, but it is often frequented by snorkelers. The marine life near the surface includes Gurukuma, Gurukun, and Japanese Crayfish, along with schools of sparrowfish, hawksbill turtles, snappers, and the rare red clownfish. Sea turtles are commonly observed in this area.

26.4425, 127.7744

Rainbow Arch

Rainbow Arch, located in Aigaura, Minami Ise, Mie, features a prominent arch ceiling adorned with colorful soft corals. The site is inhabited by various marine species, including rock lobsters, eels, nudibranchs, and shrimp, making it suitable for both macro and wide-angle photography. The dive site is accessible by boat and is best visited from spring to fall when visibility is optimal and the scenery is particularly vibrant. Additional marine life includes Japanese rockfish, snappers, hawksbill turtles, longnose hawkfish, giant frogfish, and scorpionfish, providing a diverse underwater experience.

34.2866, 136.6570

Rausu

Rausu, located on the Shiretoko Peninsula, is renowned for its unique ice diving experience, particularly from January to March when drift ice arrives from the Amur River in Russia. This site offers divers the opportunity to explore underwater environments where temperatures can drop below freezing. Marine life is diverse, featuring species such as the Hadaka Kamegai (kurione) and its primary food source, the swimming clam (Mizin-Uki-Mai). In addition to these, divers can encounter crabs, shrimps, nudibranchs, anemones, and fish like the sea lamprey. The area is also notable for the presence of Rausu kelp, adding to the ecological richness of the dive site.

43.9592, 145.1357

Red Marker

Red Marker is located near the green marker of Hija Fishing Port, north of the Hija River mouth. The dive site features a large reef that extends from east to west over a sandy seabed. The shallow sections reach depths of approximately 5 meters and are primarily covered with soft corals. In contrast, the deeper southern areas consist of a sandy muddy bottom. A notable feature on the western side is a boulder resembling granite, often referred to as a 'stone circle,' which may have originated from a ship's cargo. Marine life includes orthodox spiny dogfish, various wrasse, butterflyfish, and sea otters. All clownfish species are present except for the red clownfish, and rare nudibranchs can be spotted during the winter months. Additionally, the sandy regions on the southern side host a variety of symbiotic gobies, including Newdow's Goby.

26.3607, 127.7304

Ryuodo

Ryuodo, located on Sado Island's Ogi Peninsula, features a prominent sea cave known as Ryuoh-do Cave, often referred to as the 'Blue Cave' due to its clear waters and distinctive blue illumination. This site is suitable for both beginners and intermediate divers, providing opportunities to observe a variety of marine life including nudibranchs, seahorses, manta rays, and small crustaceans. Seasonal migratory fish can also be spotted here, making it ideal for close-up marine life observation. The dive site is accessed via shore entry.

37.8039, 138.2522

S Point

S Point, located in Minami Ise, Mie, is a dive site characterized by calm waters and clear visibility, making it suitable for both beginner and intermediate divers. The site features the notable 'Rainbow Arch' and a terrain adorned with soft corals. Divers can expect to encounter a variety of marine life, including migratory yellowtail, amberjack, snappers, and macro species such as nudibranchs and crustaceans. The entry to the site is from the shore, providing easy access for divers.

34.2877, 136.6578

Saki-Motobu

Saki-Motobu, located at coordinates 26.626900, 127.879100, features rock formations that resemble a gorilla chop. The site has a maximum depth of 10 meters, making it suitable for both novice and experienced divers. The sandy bottom is complemented by soft corals and is home to a variety of marine life, including clownfish, spiny dogfish, symbiotic gobies, yibarakanzashi, kanzashi hermit crabs, and seasonal schools of mijun and Formosan landlocked salmon. The site is sheltered from northern winds, providing calm diving conditions throughout the year.

26.6269, 127.8791

Sakieda Big Arch

Sakieda Big Arch, located in Kabira on the western side of Ishigaki, features a prominent arch that rises 3 meters high, large enough to accommodate a boat. The site experiences gentle currents and has depths ranging from 12 to 20 meters, making it suitable for divers of varying experience levels. Inside the arch, divers can observe schools of southern snappers and a variety of colorful corals. Additionally, during the winter and spring months, kelp shrimp can be seen spawning, contributing to the area's rich marine biodiversity.

24.4557, 124.1039

Sakieda Meiro

Sakieda Meiro, located in Kabira, Ishigaki, is characterized by intricate reef formations that include arches and tunnels illuminated by sunlight. The dive site has a depth range of 3 to 15 meters and typically experiences minimal current, making it suitable for beginner divers. The shallow coral reefs are rich in marine biodiversity, featuring species such as clownfish, spiny dogfish, butterflyfish, red clams, juvenile mudskippers, and various crustaceans like gizzard shrimp.

24.4539, 124.0949

Sakuraguchi

Sakuraguchi, located in southern Ishigaki, is accessible via a shore entry. The dive site features depths ranging from 5 to 15 meters, providing a habitat for various marine life. Divers can observe coral colonies and a variety of fish species, including clownfish, bigeye sunfish, and anemonefish. Additionally, the area is home to giant gobies, leaf scorpionfish, and schools of scarabaeus and rhododendron. Lobsters, nudibranchs, and mollusks can also be found here, making it suitable for divers of all experience levels throughout the year due to its sheltered conditions from north winds.

24.3269, 124.1703

Sanbondake

Sanbondake, also known as Onohara Island, is located approximately one hour by boat from Miyakejima. This uninhabited reef is designated for advanced divers due to the presence of strong currents. The dive is conducted as a drift dive, and access is contingent upon favorable sea conditions. The site is recognized for its dynamic marine environment, where divers can observe large schools of fish, including migratory species like the giant campachi. Additionally, hammerhead sharks are frequently sighted, and there is a possibility of encountering a tiger shark. The area is also home to numerous sea squirts and hawks.

34.0464, 139.3820

Sand Cross

Sand Cross, also known as Yonbori, is a shore entry dive site characterized by a network of coral formations interspersed with sandy pathways. The topography includes various arches, tunnels, and crevices, providing habitat for a diverse array of marine life. Historically, this site supported a significant population of Yaemenid fish, but recent years have seen a decline of approximately 80% in their numbers. However, the corals in the shallower regions are showing signs of recovery, regaining their vibrant colors. The site is home to a variety of soft and hard corals, including the Yasemidorii community. Divers may encounter loggerhead, green, and hawksbill turtles, as well as a range of fish species such as snappers and wrasses. Rare nudibranchs can also be spotted occasionally.

26.4257, 127.7028

Sand Triangle

Sand Triangle, located in the Kerama Islands of Okinawa, features a calm dive site characterized by a triangular formation of white sand. The depths range from 5 to 20 meters, making it suitable for beginner divers. The area is home to various marine species, including five species of clownfish, butterflyfish, and sparrowhawks, alongside vibrant reef-building corals. The presence of coral-dotted roots adds to the site's ecological diversity, providing a colorful underwater experience.

26.2261, 127.3663

Sand Way

Sand Way is recognized as a notable macro dive site, characterized by its distinctive Mt. Fuji-like shape. The depth ranges from 4 meters at the summit to 20 meters deeper. Visibility typically ranges between 10 to 20 meters, with occasional tidal currents present. The site boasts a remarkable diversity of marine life, including Jaw Fish, juvenile Ribbon Eels, five species of Anemone Fish, and Cuttle Fish. Divers may also encounter Lion Fish and schools of Batfish, among other species.

26.3100, 127.9976

Sea Of Okhotsk

The Sea of Okhotsk reaches a maximum depth of 3,916 meters, with diving opportunities in near-freezing waters from January to mid-March. Ice divers explore various depths and marine life, including fish and unique formations. Entry is typically from shore due to the site location on the Shiretoko Peninsula.

44.3219, 145.0937

Sea Wall

Sea Wall, situated in Kadena, Okinawa, is accessible via shore entry. The dive site features a shallow topography that gradually descends, with artificial submarine cables present throughout the area. This environment supports a diverse range of marine life, including clownfish, snappers, butterflyfish, anemone shrimp, and Monoceros mantis. Additionally, macro species such as spiny eels, yellow-spotted gobies, and frogfish can be observed. The water clarity is typically high, making it suitable for divers of all experience levels.

26.3570, 127.7389

SEALs Tec Buoy

SEALs Tec Buoy is located near the tip of Cape Maeda, featuring a shallow water shelf that reaches a depth of approximately 5 meters before it drops steeply to 30 meters. This dive site can be accessed by boat. Marine life commonly observed here includes scorpionfish, dusky dolphins, black stingrays, clownfish, tuna, groupers, and yasha goby.

26.4450, 127.7725

Senma Dragon Hole

Senma Dragon Hole is accessed via a beach entry. The site begins at a shallow depth, which quickly transitions to depths of 6 to 8 meters, making it suitable for training purposes. The unique light filtering through the opening creates an impressive atmosphere. Divers can expect to see a variety of marine life, with a particularly high encounter rate of green turtles. Other species that may be observed include swallowtail fish, butterfly fish, amberjacks, debassel fish, senakirilis sparrows, yellow snapper, snappers, longnose hawkfish, and gray reef sharks, although the latter has a low encounter rate.

27.7829, 128.8941

Senohama Reef

Senohama Reef features over 20 submerged iron boxes, each measuring 3 meters in length and width, which were intentionally sunk by the former Nishinoumi Town to create habitats for marine life. These boxes are now scattered across a sandy bottom and attract a variety of migratory fish. Divers can explore the area by navigating around the boxes, with opportunities to observe numerous species including sparrowfish, snappers, groupers, scorpionfish, and schools of yellowtail. Additionally, turtles, and occasionally sharks or rays, may be encountered. For those interested in macro photography, the site is known for its vibrant nudibranchs, particularly the brightly colored pikachu variety. This dive site supports a diverse ecosystem, making it suitable for both wide-angle and macro photography.

32.9484, 132.4973

Sesoko Island Labyrinth

Sesoko Island Labyrinth is situated in the East China Sea, approximately 8 km in circumference and connected to Okinawa by the Sesoko Bridge. The dive site features a network of caves, tunnels, and arches. Within the crevices, divers can observe various marine life, including dandelions, red scorpionfish, and five species of clownfish. Additionally, Napoleons can be found in the area, along with Red and Blue Crabs, Blue Scorpionfish, and Black and White Gobies. Schools of damselfish are also present, contributing to the site's biodiversity. The entry to the dive site is from the shore.

26.6390, 127.8564

Shark City

Shark City, located in Aigaura, Minami Ise, Mie, is a sheltered bay dive site with depths reaching up to 17 meters and generally minimal current, making it suitable for divers of all experience levels throughout the year. During the summer to fall months, divers can encounter hammerhead and dorado sharks. In contrast, the winter to spring period is characterized by a rich variety of macro life, including dungeness fish, snapping turtles, and nudibranchs.

34.2994, 136.6622

Shark Fin

Shark Fin is located along the road connecting Rankoshi Ocean Road to Iwanai City. Access to the site is straightforward, featuring stairs leading down to the water. Facilities such as parking and restrooms are available near the entrance. The beach is rocky, so appropriate footwear is recommended for walking. This site is suitable for open water divers and freedivers. Underwater, divers can explore caves and rocky formations where various snails and octopuses can be found. The area is characterized by an underwater garden filled with seaweed, other aquatic plants, and small fish, providing a diverse marine environment.

42.9251, 140.4014

Shikanoshima Island

Shikanoshima Island is situated in the northern region of Hakata Bay, approximately 45 minutes by car from central Fukuoka. The island is linked to the mainland via a sandbar, providing easy access for divers. This site is frequently utilized for beginner diving courses due to its accessible shore entry. During the summer months, divers can observe a variety of southern fish species, including damselfish, hornbills, and black lily gobies, along with numerous nudibranchs that thrive among the abundant marine sponges. From winter to spring, divers may also encounter danglers and seahorses, adding to the site's diverse marine life.

33.6874, 130.3050

Shikotsuko Lake

Shikotsuko Lake is known for its exceptional water quality, maintaining the highest standards in Japan for five consecutive years. The lake offers impressive visibility, reaching up to 50 meters from January to June. Divers can engage in ice diving from January to March, providing a unique experience. During the warmer months from July to September, divers may encounter endemic duck species, various aquatic plants, blue-winged carp, rainbow trout, and red-bellied shrimp. Notably, from mid-October to late November, the spawning season of rainbow trout occurs, allowing for sightings of red-bellied trout displaying nuptial colors. River drift dives into the river that drains from the lake can reveal rare blue and white carp.

42.7432, 141.3065

Shimamawari

Shimamawari features a unique underwater topography resembling a large rock formation that descends from 6 meters to 30 meters. The site is characterized by steep drop-offs in all directions. On the western side, there is a small cave and a remote root structure. The area is home to a variety of marine life, including migratory species such as amberjack and yellowtails, which can often be seen due to the moderate tidal conditions. The tops of the roots are adorned with numerous corals and anemones. During winter, divers may encounter stingrays and basking sharks, while hawksbill turtles and whitebait are present year-round. The current at this site can be swift but is generally manageable for divers.

33.4932, 135.6577

Shimozone

Shimozone is a drift diving site located at coordinates 26.143500, 127.247600, where divers can experience strong tidal currents and vertical water movement. This site is suited for advanced divers who can manage their buoyancy and positioning in the water. The marine life includes large schools of bluefin trevally, Spanish mackerel, and grey reef sharks, along with migratory species such as blue marlin and bluefin tuna. The absence of nearby islands allows for an unobstructed dive experience in open water.

26.1435, 127.2476

Shimura Beach

Shimura Beach, located in Katsuura, Chiba, is situated to the west of the Underwater Park. The dive site features a variety of underwater topographies with shallow areas that are suitable for novice divers. Entry is made from the fishery cooperative, where divers can utilize guide ropes, buoys, and marked lines extending to 30 meters for safe navigation during training and experience dives. Marine life observed at this site includes solitary snapper, basketfish, seahorses, dogfish, nudibranchs, dungfish, bluefin squid, horse mackerel, sardines, stingrays, basking sharks, and various species of snappers.

35.1339, 140.2826

Shirahama

Shirahama is a well-known dive site located on the Kii Peninsula, easily accessible from the Kansai region. It has a long-standing history as a popular diving destination, particularly favored by local divers. The site offers both beach and boat entry options, making it versatile for different diving preferences. During the fall season, divers can expect to see migratory species such as hawks, pike, and yellowtail, alongside larger marine life like green sea turtles. The area is rich in biodiversity, featuring a range of both macro and larger creatures, providing a varied diving experience.

33.6769, 135.3413

Shiratori

Shiratori, located on Irabu Island, showcases diverse underwater topography, including the notable Denter Rock, which reaches depths of 30 meters, and the well-lit Shiratori Hole. The site is abundant in marine life, featuring pygmy seahorses, nudibranchs, glass gobies, and colorful species such as snappers and flower clownfish. Divers may also encounter seasonal visitors like manta rays, whitetip sharks, sea turtles, and other large fish, making it suitable for divers of all experience levels.

24.8659, 125.1659

Shishihama

Shishihama is a shore dive site located near Mt. Fuji, featuring a diverse marine ecosystem. The site is known for its variety of marine life, including leaf fish, wrasse, frogfish, ghost pipefish, scorpionfish, moray eels, groupers, flounder, sea slugs, squids, octopuses, and sea turtles. Coral formations are also present, contributing to the site's ecological richness. Night diving is available daily, but reservations are required at least two days in advance. The dive site offers access to a diving pool filled with seawater, and a range of tank sizes from 6L to 14L, including Nitrox and specialized tanks for side diving.

35.0476, 138.8850

Shobusawa

Shobuzawa, located in Kawazu-cho, Shizuoka, is situated on the east coast of Izu. This dive site is characterized by its volcanic origins, featuring unique lava formations, sandy areas, and reefs. It is accessible from the beach, making it suitable for divers of all experience levels. The site is particularly favored by macro divers throughout the year due to its clear waters and diverse marine life. Seasonal highlights include squid spawning and snappers in spring and summer, barracuda and sea bream in the fall, and various macro species during winter. Tropical fish can be observed year-round, adding to the site's appeal.

34.7288, 138.9934

Slope Beach

Slope Beach is a shore-entry dive site located at coordinates 35.540000, 135.501400. The site is sheltered within a bay, making it accessible for diving nearly year-round. It is particularly suitable for beginners and training purposes. Divers can expect to encounter a variety of macro marine life, including seahorses and nudibranchs. During the early summer months, schools of migratory fish, such as yellowtail, can also be observed in the area.

35.5400, 135.5014

Snake Hole

Snake Hole is located on the west coast of Irabu Island in Okinawa. This dive site features a cave that lies at depths of 5 to 8 meters, with a chamber measuring 4 meters in width and 10 meters in depth. Inside the air dome, divers may experience a fog-like effect caused by wave pressure, creating a unique underwater environment. The site is home to various cave-dwelling species, including southern giant hawkfish, longnose hawkfish, and tuna giant hawkfish.

24.8640, 125.1796

Sodaine

Sodaine is a prominent pinnacle located in Atami, Shizuoka, with depths ranging from 15 to 30 meters. The site features a sandy slope on the southeast side and a steep drop-off to the northeast, making it appealing for divers interested in varied underwater topography. Schools of snappers can be observed between 10 and 20 meters, alongside other marine life such as wrasses, Japanese snow fish, crocodile fish, and red-spotted lobsters. The best diving conditions occur from fall to winter, when visibility is enhanced, allowing for clear views of the vibrant soft corals and dynamic terrain.

35.0810, 139.0897

Soft Coral Garden

Soft Coral Garden, located in Hozaura, Minami-ise, Mie, is a boat-entry dive site that reaches depths of up to 25 meters. This site is characterized by its vibrant soft corals and a diverse array of marine life, including seahorses, frogfish, snappers, and bumphead parrotfish. The underwater environment supports a rich variety of smaller species such as scorpionfish and nudibranchs, making it suitable for divers of all experience levels.

34.2951, 136.6686

Sohugan

Sohugan is a unique rock formation situated approximately 570 kilometers south of Tokyo, positioned between the Ogasawara Islands and Hachijojima Island. This rock rises to an altitude of 99 meters from a depth of 2500 meters. The site is accessible via shore entry. Divers can expect to encounter a variety of migratory fish species, including bigeye trevally, longnose trevally, kappores, yellowtail, and large bluefin tuna. Additionally, various shark species inhabit the area. Depending on the time of year, sightings of humpback and beaked whales may also occur.

29.7944, 140.3426

Sokodo

Sokodo Beach, located in the northeast of Hachijojima, is characterized by its clear waters known as 'Hachijo blue.' Divers enter from the embankment, which leads to the Mimata Arch. This site is home to various marine species, including long snappers, striped anemonefish, and bluefin squid. Seasonal squid spawning occurs here, and divers can frequently spot green turtles and sevengill snapper, making it suitable for both novice and experienced divers.

33.1240, 139.8163

Soshimaoki-1none

Soshimaoki-1none features a dive site where the tops of the roots are located between 13 meters and 17 meters. The dive typically follows the western drop-off, which descends vertically to a depth of 30 meters. The sandy seabed is characterized by its white color, and the root structures are adorned with soft corals, including sea squirts. This site is best suited for intermediate to advanced divers due to varying currents that can occur depending on the time of day and season. The shallowest area reaches a depth of 14 meters, while the maximum depth is 30 meters. Marine life commonly observed here includes Japanese amberjack, dogtooth tuna, threadfin bream, bigfin bream, scorpionfish, and various species of lobsters.

33.4776, 135.6882

South Rock

South Rock features dramatic cliffs along its southern slope, reaching heights of 30 meters due to significant erosion from typhoon waves. Divers can explore steep drop-offs and extensive terraces found between depths of 25 to 35 meters, making it a notable site for those interested in unique underwater topography. The marine life includes a variety of species such as snappers, groupers, scorpionfish, schools of rockfish, amberjack, yellowtail, turtles, and occasionally sharks, rays, frogfish, and flounders. However, the overall fish population is relatively smaller compared to nearby dive sites, attributed to the area's dynamic topography that offers fewer hiding spots for smaller fish.

32.9425, 132.4533

South Steps / Water Treatment Plant

The South Steps, located at the Water Treatment Plant in Sunabe, Chatan, Okinawa, is a shore entry dive site featuring a drainage outlet at a depth of 10 meters, often referred to as the 'UFO.' This area, along with the water outlet known as the 'temple,' serves as an artificial reef attracting various marine life. Divers can observe barracuda and crucian carp in the vicinity, while the soft coral gardens are home to gobies, clownfish, and other small fish. The sandy regions provide shelter for diverse marine species, making it an engaging dive spot.

26.3222, 127.7469

South to South

South to South is situated south of Ukihara Minami Island, just beyond the Uruma Barrier Reef. The site features some of the largest Ryukyu cabbage corals in the region, primarily found at depths between 10 and 15 meters. The maximum depth at this location reaches 30 meters. Divers can observe various marine life, including scorpionfish, nudibranchs, bearsnails, and sea snakes around the cabbage corals. The entry to this dive site is from the shore.

26.2842, 127.9803

Sukuji Gurukun no Ne

Sukuji Gurukun no Ne is a dive site situated offshore from the Kabira area on Ishigaki Island, with depths ranging from 10 meters to 35 meters. The site features a drop-off and is characterized by dynamic currents, making it suitable for divers with intermediate skills and above. Marine life includes blue croaker, spotted eagle rays, and Napoleon fish, along with various root anemones that host snappers, clown fish, and nudibranchs.

24.4717, 124.1122

Sumisaki

Sumisaki is a dive site located in Kushimoto, featuring a prominent pinnacle that descends to approximately 12 meters. The depth increases to a maximum of 27 meters as you move further north. The site experiences minimal current, making it accessible for divers of all experience levels. Scattered remote pinnacles can be found in the area, including one situated to the northeast and a cleaning station located to the west. Under the anchor, divers can observe snappers throughout the year, while kudagombe, glass gobies, and bannerfish are frequently seen in the northeastern section. Seasonal sightings include frogfish and nudibranchs.

33.4560, 135.7563

Sunabe - Birdcage Mushroom

Sunabe - Birdcage Mushroom, located in Chatan, Okinawa, features a unique birdcage-shaped seawater intake. The dive site is accessible from the beach and ranges from depths of 5 to 15 meters, making it suitable for divers of all experience levels. The area is surrounded by soft corals and is home to various marine life, including schools of barracuda, butterflyfish, clownfish, spiny dogfish, and crustaceans, along with gobies and other small fish.

26.3221, 127.7473

Sunabe No. 1

Sunabe No. 1 is located at Sunabe Beach in Chatan Town, approximately 40 minutes north of Naha City. The site features a beach entry, with a maximum depth of around 20 meters and average visibility of about 15 meters. It is frequently utilized for beginner diving activities, including trial dives and certification courses. Divers can observe various species such as rock damsels, cross damsels, clownfish, and hammerhead clownfish. Additionally, if divers venture offshore to the sandy areas, they may encounter rare gobies like the Yashia Goby and Hirenaga threadfin goby, as well as jawfish.

26.3256, 127.7428

Sunabe Seawall

Sunabe Seawall, located in Chatan, Okinawa, is a shore-entry dive site with depths reaching up to 20 meters. It is suitable for divers of all experience levels. The site is characterized by its vibrant soft corals, earning it the nickname 'underwater flower garden.' Notable marine life includes clownfish, gobies, jawfish, pygmy seahorses, and whiptail shrimp. Seasonal visitors such as barracuda and hawksbill turtles can also be spotted, contributing to the diverse marine ecosystem present year-round.

26.3217, 127.7481

Sunabe Water Treatment Plants

The Sunabe Water Treatment Plants dive site is situated along the Miyagi Coast in Chatan Town, Okinawa Prefecture. It features an underwater device resembling a UFO, located at a depth of approximately 13 meters, which intakes and releases seawater. When the water treatment facility operates, it generates warmer water in the vicinity. This site supports both shore and boat diving. Divers can observe a variety of marine life, including nudibranchs, clownfish, dorado, butterflyfish, sparrowhawks, and mantis fish. From November to March, water temperatures drop below 24 degrees Celsius, making it a favored location for macro diving.

26.3229, 127.7443

Tago

Tago offers a shore entry point with access to both a bay and open sea. The bay features a notable Green Turtle Coral formation, surrounded by a variety of small tropical fish. Divers should maintain neutral buoyancy to protect the delicate seaweed coral community present in this area. In the open sea, divers may encounter kuei (Japanese butterflies) and yellowfin tuna, adding to the diverse marine life experience.

34.8038, 138.7570

Tajiri

Tajiri is situated at the eastern end of Tottori Prefecture, facing the Sea of Japan. The area is characterized by a diverse coastal topography that has been designated as a nature park within the San-in Coast geopark. This complexity extends underwater, featuring numerous waterways, horizontal holes, and caves located at mid-water depths. The site is particularly appealing to divers interested in unique underwater formations. Notable marine life includes the pink clownfish, known for its distinct juvenile pattern and reddish hue, as well as the Himetatsu, which can be observed during late-night courtship and childbirth. Additionally, divers may encounter cloaked octopus, sakura dango fish, sakura fish, and migrating yellowtail.

35.5938, 134.3153

Taketomi Island UW Hotspring

Taketomi Island UW Hotspring is situated on the northern side of Taketomi Island, approximately 15 minutes by boat from Ishigaki Island. The site features several openings in the sand where hot spring water emerges at a depth of around 20 meters. In the shallower regions, divers can observe a variety of corals, including areas adorned with sea fans. Common marine life includes Debas damsels, kusa gobies, and mantis shrimps, with occasional sightings of sea turtles in the vicinity.

24.3444, 124.0857

Taketomi South Potato Rock

Taketomi South Potato Rock, located on Taketomi Island, is a tranquil dive site with a maximum depth of approximately 13 meters. The area is characterized by sandy bottoms and is home to a variety of marine life, including schools of yellow and big-eye snappers, red goatfish, and various gobies. Notably, during the winter months, divers can observe the spawning behavior of common snapper. The site is primarily composed of common shikoro coral colonies, providing a rich habitat for the diverse aquatic species found here. This site is suitable for beginners due to its calm conditions and vibrant underwater scenery.

24.3008, 124.0981

Tanabe

Tanabe is a popular dive site located near the Kansai area, offering easy access for day trips. The site is part of a larger region that includes Hoyo and Minabe, featuring over 30 dive points accessible from the shore. Divers can expect to see the striking lemon-yellow Great Mussel Anemone, along with various marine life such as damselfish, black damselfish, schools of Japanese squirrels, and horse mackerel. Notable macro species include flippers, threadfin dippers, Yanodate gobies, scalloped gobies, jawfish, and giant sea horses, making it a diverse environment for underwater exploration.

33.7319, 135.3522

Tanegashima Island

Tanegashima Island is situated approximately 100 km south of Kagoshima and is known for its space center, where rocket launches occur. The island can be accessed from Kagoshima via a 30-minute flight or a 1.5-hour ride on a high-speed boat. The dive site features a variety of marine life, including schools of striped jacks, red flounders, yellow snappers, and stingrays in sandy areas. In the rocky regions, divers can observe yellowtails, Asian red snappers, and angelfish. Additionally, there are dynamic points where eagle rays and sea turtles can be seen. The entry to the dive site is from the shore.

30.6624, 131.0010

Tanicha Tower

Tanicha Tower is characterized by a prominent coral formation that rises from a depth of 40 meters. Divers typically start their exploration at this drop-off, moving through the surrounding crevices and onto a sandy seabed that extends from the base of the coral at around 35 meters. This site is known for sightings of large marine species, including bull rays and Japanese eagle rays in the sandy areas. Additionally, encounters with Napoleons and various large fish are common. As divers ascend towards shallower depths, they are likely to see loggerhead turtles, green turtles, and hawksbill turtles.

26.4811, 127.8214

Tappizaki

Tappizaki, located at the northern tip of Honshu in Aomori, is a notable dive site accessible from the shore. Divers can encounter a variety of marine life including snappers, horse mackerel, lingcod, and colorful nudibranchs. A distinctive feature of this site is a small tunnel rock that attracts divers for repeat visits. The area is also recognized for its unique northern sea creatures, making it a significant spot for both diving and camping.

41.2564, 140.3384

Tebirokaigan

Tebirokaigan, located on Amami Oshima Island, is a shore dive site suitable for beginners. The maximum depth here is 10 meters, and the site is best visited during winter when the northerly winds are calmer. The gentle tides create an ideal environment for relaxed diving and macro photography. Divers can expect to see a variety of marine life, including nudibranchs, gobies, spiny dogtooth eels, and frequent sightings of sea turtles. The diverse ecosystem also includes frogfish and pygmy seahorses, making it a rich spot for underwater exploration.

28.4021, 129.6177

Tetra Mae

Tetra Mae is situated at the entrance of Tsuya fishing port, next to the tetrapods of the Ichimonji breakwater. The site features a sandy bottom and large tetrapods that have become artificial reefs, attracting a variety of marine life. The depth is approximately 4.5 meters, making it suitable for experienced divers, training, and snorkeling. A notable feature is the large colony of Hamanomi, with over 50 individuals observed at around 5 meters. Divers can expect to see various fish species, including snappers, spiny lobsters, clownfish, bannerfish, and yellowtail snappers. Gobies inhabit the sandy areas, and scalloped hammerheads may occasionally be spotted. Conditions are favorable for beginner freediving lessons when there is no west wind.

26.3884, 127.7203

The Devil’s Palace

The Devil's Palace is situated in the western region of Shimoji Island, approximately 30 minutes by boat from Miyako Island. Divers enter through a crevasse at a depth of around 15 meters, navigating through narrow, dark passageways and arches, with a maximum depth reaching 25 meters. The site is home to various marine life, including burrowing species such as pinecone saucers, red scorpionfish, dandelionfish, and striped mantis shrimp. Additionally, divers may encounter Japanese pygmy seahorses and fritillary shrimps. Occasional sightings of green turtles, white tip sharks, and sea mantas enhance the experience.

24.8394, 125.1356

Three Rocks

Three Rocks, located in Yaeyama near Ishigaki Island, features three prominent rocks surrounded by a diverse coral ecosystem. The site is home to various marine species, including schools of snappers and scorpionfish, as well as macro life such as nudibranchs and frogfish found in the reef crevices. Divers may also encounter occasional manta rays, adding to the site's appeal. The entry to the dive site is from the shore, making it accessible for divers.

24.3576, 124.0432

Tobishima

Tobishima is situated 39 km from Sakata City, featuring a vertical drop to depths of 40 meters. The site is known for its clear waters, particularly in August when visibility reaches between 20 and 30 meters. Divers can observe a variety of marine life including schools of bluefin tuna from May to September, along with jawfish, damselfish, lobsters, snapper, and black rockfish. A notable feature is a wall of horse mackerel. In the autumn months, divers may encounter large jellyfish exceeding one meter in length. The entry to this dive site is from the shore.

39.1947, 139.5601

Todomari no hana

Todomari no Hana, located in Aigaura, Minami Ise, is a boat-entry dive site with depths reaching up to 28 meters. The area is characterized by artificial breakwaters that serve as fish habitats, attracting a variety of marine life including dotishima, kampachi, yellowtail, and hawksbill turtles. Divers can also encounter red rock snapper, soft corals, and a range of macro species such as nudibranchs, cuttlefish, and moss blenny. The site typically experiences minimal current, making it suitable for divers of all skill levels.

34.2894, 136.6635

Toi Beach

Toi Beach, located in Izu City, Shizuoka, is a notable dive site characterized by its calm beaches and diverse marine environments. The site is accessible from the shore and features a variety of marine life, including macro species such as bear clams, clownfish, and seahorses. Additionally, divers may encounter larger species like hammerhead sharks and white sharks. The area is particularly rich in biodiversity, with seasonal visitors like swallow and flying fish appearing during the fall and winter months. This site is suitable for divers of all experience levels, offering opportunities for both casual exploration and more adventurous dives.

34.9048, 138.7836

Toilet Bowl

Toilet Bowl, located in Onna Village, Okinawa, features a significant drop-off that begins at 4 meters and descends to depths exceeding 40 meters. This site is characterized by its underwater stalactite caves and is home to a variety of marine life, including rock cod, barracuda, snappers, gobies, and crustaceans. The presence of currents makes this dive site more suitable for intermediate to advanced divers. Entry to the site is from the shore.

26.5041, 127.8464

Tokara Islands

The Tokara Islands are a group of small islands located between Yakushima and Amami Oshima in Kagoshima Prefecture, approximately 160 kilometers from Kagoshima. Access to these islands is limited, with only two ferries operated by local villages each week. The dive site features a variety of marine life, including schools of migratory fish such as bigeye trevally, bluefin trevally, and Napoleon wrasse. Divers may also encounter larger species like marlin, hammerhead sharks, and stingrays. Notably, there is a manta ray point at the northern end of the islands, as well as an undersea hot spring area. The entry to the dive site is from the shore, making it accessible for divers looking to explore the unique underwater environment.

29.8217, 129.7415

Tokashiki Sanbonne

Tokashiki Sanbonne, located in Tokashiki Village, features three notable underwater roots with depths ranging from 5 to 30 meters. This site is suitable for divers of all experience levels, characterized by gentle currents and an array of stunning table and branching corals. Marine life commonly observed here includes green turtles, spiny dogfish, gobies, and snapping turtles, with occasional sightings of whitetip reef sharks.

26.1952, 127.3430

Tokashiku Beach

Tokashiku Beach, located on Tokashiki Island in Okinawa, features clear waters known as 'Kerama blue' and a sandy shoreline. This site is frequented by green sea turtles and is home to a variety of marine life including clownfish, butterflyfish, and nudibranchs. It is suitable for both beginner and advanced divers. Visitors should be aware that swimming outside of lifeguard hours is done at their own risk, so planning is essential.

26.1860, 127.3474

Tokomasari Reef

Tokomasari Reef, located in Itoman, Okinawa, is accessible by boat and is a drift dive approximately 10 minutes from the port. The site features a prominent west dome where divers can encounter large species such as giant trevally and occasional sharks. Outside the dome, Napoleon fish, rock cod, and summer bigeye jacks can be observed. The eastern section is characterized by vibrant coral formations, while the north side experiences fast currents, making it suitable for advanced divers. Marine life at Tokomasari Reef includes dogtooth tuna, barracuda, various shark species, turtles, sawfish, snappers, and butterflyfish.

26.0972, 127.6388

Toma No.1

Toma No.1 is situated on Zamami Island within the Kerama Islands. This dive site is typically accessed from the shore and is favored for diving from October to April when northern winds are prevalent. The area features a broad sandy slope, making it suitable for beginner divers. While encounters with coral and sea turtles are infrequent, the site offers excellent visibility characteristic of the Kerama region, along with a variety of soothing marine life such as garden eels, damselfish, and glassfish. The likelihood of spotting green sea turtles is low.

26.2295, 127.3299

Toma No.2

Toma No.2, located on Zamami Island in Okinawa, is a sheltered bay dive site that is particularly suitable for novice divers, especially during the winter months when it is shielded from northern winds. The site features a sandy bottom interspersed with coral colonies, providing habitat for a variety of marine species. Notable marine life includes Debas pumice, garden eels, leaf scorpionfish, bigeye and longtail snappers, clownfish, lanternfish, and occasional sightings of western blue tangs. The site offers a calm diving experience with good visibility, making it a relaxing environment for divers.

26.2311, 127.3286

Tomo

Tomo, located in Aigaura, Minami Ise, is a dive site accessible by boat. The area is characterized by intricate root structures and a diverse array of marine life. Divers can expect to encounter species such as rock cod, yellow croaker, and various butterflyfish. The site is particularly rich in macro life, with opportunities to see juvenile frogfish, yellow-spotted shrimp, and anemone shrimp. Additionally, the presence of rockfish, yellowtail snapper, pufferfish, and numerous nudibranchs, including loggerhead and red-bellied varieties, contributes to the site's biodiversity.

34.2978, 136.6571

Tonbara

Tonbara is located off the southeast coast of Kume Island, approximately 30 minutes by flight from Okinawa. The dive site features a large, rugged rock that rises 2 kilometers from the seabed. This area is known for its favorable tides and high likelihood of encountering large marine species. Notably, during the winter months, divers can frequently observe hammerhead sharks as they migrate through the region. Additionally, from winter to spring, humpback whales can be spotted, providing opportunities for close encounters. The diving style here is primarily drift diving, making it suitable for experienced divers.

26.2694, 126.8191

Tori Ike

Tori Ike is accessed from the shore and features a unique underwater cave system. Divers can enter a descending cave and navigate through an opening that leads to a large pond on land. The site is home to a variety of marine life, including southern grouper, Hawaiian Cave shrimp, red-finned flounder, red-finned angelfish, black-eyed shrimp, black-eyed flounder, juvenile yellow-eyed wrasse, and frogfish. Additionally, sightings of dolphinfish, bluefin tuna, and manta rays are possible in this area.

24.8230, 125.1353

Toujima

Toujima is situated on the southernmost part of the Izu Peninsula, characterized by its diverse underwater scenes that change with the seasons. The site is accessible from the shore and offers opportunities to observe various marine life. In early summer, divers may encounter eagle rays, while sea turtles are present throughout the year. Occasionally, schools of hammerhead sharks can be spotted. During the winter months, humpback whales migrate offshore, providing a chance for sightings if conditions are favorable.

34.6102, 138.8174

Toya 270

Toya 270, also known as Ni Nana Zero, is located near Cape Samba and features a diverse underwater topography that includes drop-offs and caves reaching depths of over 40 meters. This site is frequented by divers interested in wide-angle photography, as it is home to various marine species such as Napoleon fish, giant jacks, sea turtles, Steller’s sea rays, dogtooth tuna, and bluefin reef sharks. Additionally, divers can explore historical artifacts from World War II, including tanks, M1 rifles, and flamethrowers, which add an intriguing element to the dive experience.

26.3864, 127.7102

Triangle

Triangle, located in Manazuru, Kanagawa, features a large artificial reef constructed from a substantial steel frame that was submerged during the building of the Iwa Ohashi Bridge. This structure rises 10 meters high and spans 50 meters in width, providing a habitat for various marine species. Divers can observe schools of snappers and horse mackerel, as well as groupers and sea bass, alongside vibrant soft corals and seasonal nudibranchs. The site is accessible from the shore and is suitable for divers of all experience levels, offering opportunities for both macro photography and wider underwater vistas.

35.1570, 139.1488

Twin Cave

Twin Cave is a mid-depth dive site situated at a depth of 18 to 20 meters, characterized by two interconnected cave entrances. The site is illuminated by light filtering through the openings, creating a distinct blue curtain effect. Divers can observe schools of fish, including southern moray eels and red cape cave fish, as well as various crustaceans such as caecilian lobsters and nudibranchs. Occasional sightings of manta rays and nemuribranchs add to the site's appeal. This location is best suited for intermediate to advanced divers due to its topographic features and light contrasts.

24.8018, 125.1600

Uchizan

Uchizan is located in the central area surrounded by the Kerama Islands, including Maejima, Kuroshima, and Tokashiki. The site features an average depth of 15 to 20 meters and is characterized by currents, making it suitable for intermediate to advanced divers. It serves as a cleaning station for Manta rays, which adds to its popularity among divers. Additionally, divers can observe various marine life such as Giant Trevally, and a rich array of fish species including the Bluefin Trevally, Yellowtail Snapper, and the Blacktip Reef Shark. The cleaning process for Manta rays is primarily facilitated by the Cleaner Wrasse.

26.2209, 127.4150

Ugan

Ugan is located on the northeastern side of Zamami Island, characterized by its sharp rocky formations and dynamic underwater terrain. The site features significant drop-offs, with depths reaching up to 35 meters. Divers should be prepared for a constant and sometimes strong current. Marine life is abundant, with sightings of butterflyfish, tuna, whitetip reef sharks, and yellowtail tunas in the blue waters. The seafloor is home to various macroscopic organisms, including ribbon eels, pygmy seahorses, blue tangs, furisode shrimps, and spiny crabs.

26.2483, 127.3334

Ukibaru North

Ukibaru North is situated a few hundred meters north of the floating island. The dive site features a sandy bottom interspersed with numerous fine fan corals. Divers can expect a maximum depth of 16 meters, with an average depth ranging from 10 to 15 meters. The area is home to glass cardinal fish that inhabit the small bommies, along with various small shrimp and crabs that can be observed during dives.

26.3057, 127.9962

Umagai

Umagai, located on Kume Island in Okinawa, features a notable drop-off that transitions from shallow to deep waters, appealing to those interested in underwater topography. The site is home to various marine species, including parrotfish, hanagoi, snappers, gurukuns, turtles, monkfish, zebra goby, and rare deep gobies such as Pseudobagrus ichikawai and Smilax glabra. Divers may also encounter manta rays occasionally. The clear waters provide excellent visibility, making it suitable for underwater photography.

26.3547, 126.8720

Uminchu

Uminchu, located near Tokashiki Island in the Keramas, features a sandy shore entry and is characterized by its clear waters and calm conditions, making it suitable for beginner divers. The site is adorned with scattered artificial reefs that support a variety of marine life. Divers can expect to see schools of snappers, Kerama snappers, and red clams, as well as swallowfish and red clownfish inhabiting the reefs. The presence of swallowtail butterflyfish and toadfish adds to the diversity of species found here.

26.1861, 127.3410

Under The Okganzaki Lighthouse

Under the Okganzaki Lighthouse, divers can explore a diverse underwater landscape characterized by intricate topography, including both large and small roots starting at a depth of 10 meters. The area features winding channels and is frequented by migratory species such as rock cod. Additionally, divers may encounter schools of snappers and blue tangs, along with rockfish, gobies, and nudibranchs, contributing to the rich marine biodiversity of the site.

24.4537, 124.0784

Urban Sports Pool

The Urban Sports Pool is specifically designed for diving training, featuring a dedicated diving pool that operates a large circulation system continuously to ensure hygienic and clear water. The water quality is meticulously maintained by staff to provide optimal conditions for training. Adjacent to the pool are shower facilities, and complimentary locker rooms are available for divers. For nighttime diving, illumination is provided, allowing for training sessions after hours. Underwater mirrors are installed for divers to check their trim and skills. The site supports backroll entries and includes rudder facilities, with the option to simulate boat dive scenarios during training.

38.7172, 139.8479

Urunosachi

Urunosachi, located on Zamami Island, features a coral ecosystem characterized by pastel colors, resembling a flower garden, with depths reaching up to 11 meters. This site is suitable for beginner divers but also offers opportunities for deeper exploration offshore. Frequent encounters with sea turtles are a highlight, along with sightings of debassa damselfish and pygmy seahorses. Diving at this site requires a guide.

26.2242, 127.2932

Usami Kagone

Usami Kagone, located in Shizuoka, is a boat dive site suitable for beginners. The dive reaches a depth of 18 meters, where the sandy bottom is rich in macro life. Divers can observe Datura goby symbiosis, various nudibranchs, and different crustaceans. The area is also home to green turtles and catsharks, along with cirripedes, which can be spotted throughout the year. During the winter to spring months, hawksbill turtles may also be seen.

35.0061, 139.0957

Usami Manbo Point

Usami Manbo Point is a boat dive site located approximately 5 minutes from shore. The dive reaches a maximum depth of 25 meters and features a rocky reef that is home to purple spiny dogtooth sharks and a variety of soft corals. Divers can expect to see a diverse range of marine life, including snappers, yellowtail, hawksbill turtles, kampachi, wrasses, catsharks, and sunfish. Additionally, macro life such as nudibranchs and crustaceans can be found in this area.

35.0066, 139.0954

Usujiri Jinjamae

Usujiri Jinjamae is located in the town of Usushiri, part of Hakodate City in Hokkaido. The site offers a diverse marine ecosystem with a notable ecological balance. Water temperatures range from a low of 2 degrees Celsius to a high of 21 degrees Celsius during the summer months, allowing for year-round diving opportunities. From March to April, divers can observe the hatching of young Whitefish and the breeding season of lingcod, during which numerous egg masses can be seen. Additionally, there is a chance to encounter various criones and jellyfish riders in the area.

41.9354, 140.9513

Villa

Villa Beach, located in northern Amami-Oshima, is a shore-entry dive site suitable for both beginner and intermediate divers. The dive reaches depths of up to 15 meters and provides easy access from the nearby shop. The shallow areas are characterized by table corals and are frequented by sea turtles. Notable marine life includes butterflyfish, bear clams, tropical fish, spiny dogfish, gobies, and cuttlefish. After the full moon in June, divers can witness coral spawning, a remarkable natural event.

28.4060, 129.6344

W Arch

W Arch, located on Irabu Island, is a shallow dive site with a maximum depth of approximately 18 meters. The site features two distinct arches, one of which resembles a heart shape from specific perspectives, making it notable for photography. Behind the arches, a small cave provides habitat for various macro species, including Longnose Hawkfish, shrimp, and crabs. The area is rich in macro life, including nudibranchs and a variety of crustaceans, making it suitable for divers of all experience levels.

24.8654, 125.1592

Whale Shark Point

Whale Shark Point, located off Miyakoya Port in Yomitan, is a dive site known for its encounters with whale sharks, the largest fish in the ocean. Divers can approach these gentle giants within 50 cm. The site is characterized by calm waters throughout the year, making it suitable for divers of all experience levels. In addition to whale sharks, divers may also observe a variety of marine life, including swallow fish, giant jacks, barracudas, tropical fish, and turtles. The site provides a unique opportunity for both snorkeling and scuba diving experiences.

26.3906, 127.7232

Yaene

Yaene is located on the west coast of Hachijojima and features a calm bay with a beach entry, making it accessible for divers of all experience levels. Approximately 200 meters from the shore, divers can explore a 12-meter deep arch that is home to snapping turtles and rock lobsters. The site is also frequented by green turtles, and divers can observe various macro life, including nudibranchs and bee-eaters.

33.0986, 139.7714

Yakushima

Yakushima is an island located approximately 30 minutes by plane from Kagoshima, featuring a circumference of around 130 km and an area of 500 km². The island is home to a prehistoric forest and is known for its famous Jomon cedars. Divers can expect to encounter a variety of marine life, including large species such as bluefin tuna, bigeye trevally, bluefin trevally, reef sharks, stingrays, and occasionally hammerhead sharks. The site also offers opportunities to observe diverse macro life. Entry to the dive site is from the shore.

30.4546, 130.4905

Yamada Coral farm

Yamada Coral Farm, located in Onna Village, Okinawa, is accessible by boat from Maeganeku Port. This site features a large cultivated hard coral garden that is home to a variety of marine life, including clownfish, gobies, and southern scorpionfish. The area is known for its bear clams and a diverse population of small fish, making it suitable for divers of all experience levels. The conditions here provide an easy diving experience, with vibrant coral formations enhancing the underwater scenery.

26.4405, 127.7927

Yamada Point

Yamada Point is located approximately 5 minutes by boat from Maeganeku Port in Onna Village. This dive site features a coral reef with sandy flats and a gradual depth range from 5 to 26 meters. The area includes artificial coral cultivation, providing habitat for a variety of marine life. Divers can expect to see vibrant tropical fish, while snorkelers may observe sea turtles resting in the shallows. The reef is also home to gobies and echidnas, with smythnids often found on the backs of gobies in sandy regions starting in March. This site is suitable for divers of all experience levels and offers year-round diving opportunities.

26.4408, 127.7986

Yamada Sunachi

Yamada Sunachi is located approximately 5 minutes from Kaneku Port and features a sandy seabed characterized by antlion-like formations. The area is home to a transplanted coral ecosystem, with a notable cluster of finger corals situated to the south. This site previously hosted the rare tomato clownfish, which has not been seen since its anemone was taken in 1990. Marine life includes snapper, damselfish, and unique species such as the Yasha goby and pygmy seadragon. The absence of the tomato clownfish is a significant note for divers exploring this site.

26.4410, 127.7858

Yamamoto Special

Yamamoto Special is a dive site accessible by boat, located approximately 10–12 minutes from the departure point. The maximum depth at this site is 14 meters, making it suitable for beginner divers. The site is characterized by its wind-resistant conditions, allowing for year-round diving. Marine life includes five species of bear clams, various clownfish species, spiny dogtooth moray eels, and yellowtip grouper cleaning interactions. Divers can also observe youkata grouper cleaning scenes, blue-spotted coral, and schools of snappers amidst abundant macro life and sandy roots, providing opportunities for relaxed diving and underwater photography.

28.4617, 129.6194

Yokohishi

Yokohishi is situated in Uruma City, Okinawa, and is notable for housing one of the largest common shikoro corals, also known as mussel coral, on the main island. Although it has diminished in size over the years, it remains a significant feature of the site. Divers can navigate through a sandy passage leading to two large roots adorned with impressive isobana, which provide excellent photographic opportunities. The dive site reaches a maximum depth of approximately 22 meters, and divers should be aware that currents can be strong during high tide. The marine life observed here includes a diverse array of fish, crustaceans, mollusks, and sea turtles, as well as unique species such as anglerfish, frilled shrimps, Monoceros, and various nudibranchs, all thriving among one of the largest colonies of common and blue corals globally.

26.3231, 128.0078

Yonaguni Monument

The Yonaguni Monument, located off the coast of Yonaguni, was discovered in 1986 by a local diver. This site features a large staircase-shaped wall that measures approximately 250 meters in length from east to west and 150 meters from north to south. It is known for sightings of hammerhead sharks and a variety of reef fish. The dive site is accessible from the shore and is situated about 15 minutes from the nearest port.

24.4355, 123.0114

Yonaguni Monument/ Underwater Ruins

The Yonaguni Monument is a submerged rock formation located off the coast of Yonaguni in Japan's Ryukyu Islands. It features large stone structures measuring approximately 50 meters long and 20 meters wide, with depths reaching around 25 meters. Divers may encounter various marine life, and the site is often discussed for its archaeological significance.

24.4371, 123.0244

Yonara Channel

Yonara Channel is located between Iriomote Island and Kohama Island, stretching 6 kilometers in length and varying between 500 to 900 meters in width. This site features a constant current that can be quite strong, making it a drift dive experience. Divers can explore depths ranging from 9 to 30 meters. The sandy bottom is interspersed with coral roots, attracting a variety of marine life, including sea breams. Additionally, there is a significant chance of encountering larger species such as manta rays, cod, rays, catfish sharks, and green turtles.

24.3539, 123.9515

Yonehara Reef

Yonehara Reef is located at Kawadaira in the northern region of Ishigaki Island and is accessible only by boat. The site features a coral shelf that lies at depths of 5 to 6 meters, which transitions into a sandy area at depths ranging from 20 to 25 meters. The reef is characterized by a dense coverage of branch and table corals, providing habitat for various marine species. Notable marine life includes the red-headed flounder and Debus damselfish, while butterflyfish can also be observed swimming around the reef. The average depth of the dive site varies between 5 and 30 meters.

24.4589, 124.2074

Yoron Island

Yoron Island, located at the westernmost point of the Amami archipelago, is accessible in approximately 1 hour and 15 minutes from Kagoshima and about 35 minutes from Naha Airport. The island's lack of rivers contributes to excellent water clarity, typically ranging from 25 to 30 meters. Divers can expect to encounter a diverse range of macro species, including blue crabs, blue-and-white stonefish, blue-eyed gobies, yellowfin gobies, frogfish, and scorpionfish. Larger species such as bluefin tuna, bluefin trevally, flathead trevally, yellowtail, and bigeye trevally are also present in the area.

27.0490, 128.4067

Yotsushima Jetty

Yotsushima Jetty, located near Ruzaoan Island, is a unique dive site in Japan known for its shore entry. The site is accessible via a ferry pier, approximately 5 minutes by boat. It features a harbor equipped with parking, water facilities, and flush toilets. Divers can expect to encounter a variety of marine life, including notable species such as the Asian sheepshead wrasse and the red seabream. This dive site is operational during the summer months, specifically from July to October.

38.6869, 139.6174

Yubanta

Yubanta, located in Yomitan, Okinawa, features a dynamic drop-off and complex root structures, along with an underwater cave. This site is home to various marine life including giant trevally, dogtooth tuna, yellowtail, and cave fish such as red capsicum and sapphire scorpionfish. Canopy lobsters, sea fans, and spiny scorpionfish can also be observed here. The dive site is best suited for intermediate divers due to its conditions. Entry is from the shore, providing access to clear waters and diverse underwater environments.

26.3816, 127.7210

Yugawara Aqua Park

Yugawara Aqua Park, located in Kanagawa, features a 25-meter swimming pool with six lanes and a depth of 1.1 meters, alongside a dedicated diving pool that reaches a depth of 4.75 meters. This facility is designed for both scuba and freediving training, providing an environment conducive to skill development. The park also includes a gym, studio, and multipurpose space, making it a resource for local divers and fitness enthusiasts. The site reopened in 2024 and serves as a training hub for those preparing for ocean dives.

35.1442, 139.1048

Zamami Under The Lighthouse

Zamami Under The Lighthouse is located on the northeast side of Zamami Island, featuring a depth range from 3 to 22 meters within a calm cove, making it suitable for beginner divers. The site includes rock walls that conceal crevices and caves, which are illuminated by sunlight. During the summer months, divers can observe large schools of snapper and various predatory fish. Year-round, the area is home to silverback sea bream, scorpionfish, bluefin trevally, goatfish, butterflyfish, anemone crabs, and frigate shrimp, contributing to a diverse marine ecosystem.

26.2237, 127.3345

Zamrud

Zamrud is accessible via a short 3-minute walk from Hon Atsugi Station on the Odakyu Line. The site features a spacious parking area that accommodates up to 410 vehicles, with a height restriction of 2.1 meters. The first three hours of parking are free, and the facility operates in two shifts, starting at 10:00 a.m. and 4:00 p.m., allowing reservations for up to five hours. Nearby, there are additional coin-operated parking options if needed. A convenience store is also located close by for supplies. The dive site offers both shallow and deep water areas, with a maximum depth of approximately 3 meters, making it suitable for various water training activities. Equipment unloading is facilitated by a loading dock, and washing stations are available for rinsing gear. The site can accommodate small groups for training without specific limits on total attendees. Swimming caps are required for competitive swimming in the pool, and visitors have the option to relax in a Jacuzzi during their time at the facility.

35.4401, 139.3610

Zenisu

Zenisu is situated 36 kilometers southwest of Jinzu Island within the Izu Seven Islands and comprises three distinct reefs. Access to this site is exclusively via charter boat, with travel times varying from one and a half hours from Jinzu Island, three and a half to four hours from Shimoda, and up to five hours from Nishi-Izu. The dive site is known for its abundant marine life, featuring large schools of migratory fish, including sharks and green sea turtles. Divers can also observe significant numbers of butterflyfish and mackerel, along with whales that may be seen in pursuit of these schools.

33.9437, 138.8175

Zushi

Zushi is located near the city center and is a favored location for day diving. The site is accessible via a shore entry and features a depth of approximately 30 meters with sandy soil. Divers can explore a rock wall adorned with soft corals, where schools of Yellowfin Damselfish can often be seen. Additionally, various fish species such as yellow snapper, blue snapper, horse mackerel, and yellowfin reef sharks are present. During summer months, schools of amberjacks are also observable, while winter brings an increase in nudibranch sightings.

35.2945, 139.5570

青海島内湾 (Oumijima Naiwan)

Oumijima Naiwan, located in Nagato, Yamaguchi, is a tranquil dive site characterized by a sandy-muddy seabed that descends to a maximum depth of 22 meters, with an average depth of 17 meters. The area is abundant in marine life, including yellowfin goby, kusauo, and cuttlefish. Notably, from January, divers can observe the mating behaviors of chigara, adding to the site's biodiversity. Additionally, rare deep-sea snappers can occasionally be spotted, making this location appealing for macro photography enthusiasts.

34.4235, 131.2220