Diving in Cold Temperate Northwest Pacific
Quick Facts
- • Entry types: Mostly shore entries
- • Expect: Varies by conditions visibility
- • Highlights: Discover Cold Temperate Northwest Pacific's dive spots
Explore the underwater wonders of Cold Temperate Northwest Pacific, province. This region features 83 documented dive spots, each offering unique underwater experiences. Whether you're seeking calm snorkeling bays, challenging freediving depths, or exciting scuba adventures, Cold Temperate Northwest Pacific has something for every underwater explorer. Browse detailed spot information, check current conditions from recent dive logs, and connect with the local diving community to make the most of your visit.
Regional Context
🏛️ Marine Hierarchy
🌍 Associated Countries
Countries in Cold Temperate Northwest Pacific (5)
Sub-regions in Cold Temperate Northwest Pacific (4)
Popular Spots in Cold Temperate Northwest Pacific (83)
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Kanmurishima Island
Kanmurishima Island is an uninhabited landmass with a circumference of 4 kilometers, located near the entrance of Wakasa Bay in Kyoto Prefecture. The site is characterized by steep cliffs that encircle the waters, creating a dynamic underwater environment. Divers can observe a variety of marine life, including large migratory species such as yellowtail and red snapper, as well as schools of horse mackerel and Japanese sardines. In the fall, pike can be seen in large groups. The area is also home to various soft corals and a range of shark species, including yellowfin and bluefin reef sharks, along with scorpionfish and flathead reef sharks. Entry to the dive site is from the shore.
Kanmurishima Island
Kanmurishima Island is an uninhabited landmass with a circumference of 4 kilometers, located near the entrance of Wakasa Bay in Kyoto Prefecture. The site is characterized by steep cliffs that encircle the waters, creating a dynamic underwater environment. Divers can observe a variety of marine life, including large migratory species such as yellowtail and red snapper, as well as schools of horse mackerel and Japanese sardines. In the fall, pike can be seen in large groups. The area is also home to various soft corals and a range of shark species, including yellowfin and bluefin reef sharks, along with scorpionfish and flathead reef sharks. Entry to the dive site is from the shore.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.