Izu Peninsula

For a shore-focused scuba trip, start with September-December and choose thermal protection for the actual dates. This is a planning recommendation, not a promise that every site opens or that visibility will be good. Summer may better suit an advanced Mikomoto objective, while winter still has selected operating dive sites. September and October retain storm risk, and each coast can respond differently. Choose the activity first, leave room for a site swap or cancellation, and request a recent report from the provider. Sources: SUNLAIZU: seasonal diving guide; JMA: typhoon timing and tracks.

Use Ito for an east-coast stay, Numazu as a northwest gateway, and Shimoda for a southern itinerary. These are starting points rather than interchangeable bases. Your chosen dive entry may still need a pickup or road transfer, especially from central Numazu. On a short visit, concentrate on one cluster. For several days across multiple coasts, move accommodation when the main activity changes. Confirm the operator's actual meeting location before choosing a hotel, and give a non-diving companion a nearby independent plan. Sources: National Parks of Japan: peninsula access; Numazu City: tourist guide; JNTO: Shimoda.

Yes, a car-free plan is practical when the rail journey and final pickup are arranged together. The east-coast railway serves Ito and continues toward Shimoda, while IOP advertises an arranged station collection. Western bus routes also exist, but the stop, departure and last return may not suit a dive schedule. Ask the operator to confirm the whole transfer in writing before booking. With equipment and an early boat meeting, local accommodation or an agreed pickup can be more useful than simply staying near any station. Sources: JR East: Odoriko routes; Izu Oceanic Park: guided diving; Nishiizu Tourism: Shuzenji-Dogashima buses.

Selected shore programs are suitable options for a beginner, subject to the provider's assessment and the day's conditions. A training-oriented beach plan does not imply that the outer coast, offshore drift or a cave route is appropriate. State your certification, last dive and comfort with cold water and rocky entries. Ask for a conservative open-water route, equipment orientation and a clear alternative if conditions deteriorate. Do not book a signature site solely because it shares a destination name with an easier training area. Sources: Izu Oceanic Park: guided diving; Sunrise Ose: dive-site guide.

Treat Mikomoto as a specialist guided drift outing and request the provider's current acceptance rules before booking. Hammers published an October 2026 notice specifically for the 2027 season, so travel year matters. Meeting a logbook threshold does not replace recent experience in moving water, controlled descents, buoyancy and group procedures. Discuss any inactivity, medical screening requirement or unfamiliar equipment in advance. Book an alternative local diving plan if the provider considers the conditions unsuitable, and regard hammerheads as a possibility rather than an entitlement. Sources: Mikomoto Hammers: October 29, 2026 notice for 2027; Mikomoto Hammers: diving FAQ.

A general Open Water qualification does not establish suitability for every overhead or deep route. Ask whether the planned Kumomi route stays in open water or enters a passage that prevents direct ascent. Atami's wreck exterior also has a deeper profile and operator-specific prerequisites. This guide does not establish penetration permission. Choose a route within your training, equipment and experience, and request a clear exterior or reef alternative. A shallow cave, visible light or a guide's presence should not be treated as a substitute for the relevant qualification. Sources: Hamayu: Kumomi dive sites; Diving Service Atami: wreck guide; PADI: scuba and freediving safe practices.

Do not plan November access from the summer beach-ferry timetable. The 2026 Hirizo ferry season has ended. The captain advertised separate boat-snorkeling sessions for November 7-8, 2026, conditional on the morning sea state. This does not continue the summer beach shuttle. Wetsuits are required, summer swimming buoys are absent, and inexperienced visitors should consult the operator; respect the designated area and boat traffic. Ask for the actual operating decision and precise product before arranging transport to Nakagi. For a later-year summer visit, recheck the new season announcement rather than carrying forward 2026 dates. Have a land alternative and accept the daily decision if swell or other conditions prevent operation. Sources: Hirizo ferry: 2026 season-end notice; Hirizo ferry: 2026 season announcement. Hirizo captain: conditional November 7-8, 2026 boat sessions.

Current direct pages identify EastDive and Inatori Marine Sports Center as course providers. Request the exact course, instructor language, pool location, ocean venue and weather fallback rather than assuming every component occurs at one beach. Confirm your experience and the requested date before arranging transport. Ask the provider to resolve any site-access issue directly with the facility. No public deep-training buoy system or current local competition calendar was established, so arrange a specific supervised session instead of arriving with an independent training plan. Sources: EastDive: PADI freediving course; Inatori Marine Sports Center: PADI Freediver.

No. Check the managing facility and the specific activity. A dive center may control entry times, cylinders, certification checks and which areas are available, while a guided snorkeling provider may use a different calendar. At Osezaki, cape and night dives require the relevant permitted dates. Elsewhere, a public path or a beach photograph is not evidence of an authorized entry. Confirm the route and fee before arrival, obey marked channels and boundaries, and use an appropriate guide when you lack local familiarity. Sources: COCOMO Osezaki: 2026-27 diving calendar; Futo Diving Service: shore sites.

Use the dated provider examples in the fee section as starting points and obtain an itemized quote for your actual date. A guided shore day, a boat day and a specialist offshore outing can include different services. Ask about cylinders, weights, full rental, parking, local tickets, pickup, food and cancellation terms. Accommodation and travel between bases are additional. This guide uses a moderate overall planning band for a land-based trip, with more expensive optional activities; it does not claim a researched average daily hotel-and-diving package price. Sources: COCOMO Osezaki: programs and access terms; Koganezaki Dive Center: fees.

The reviewed Suruga Bay Ferry timetable provides a Shimizu-Toi crossing of about 90 minutes. It is an optional approach to west Izu, with separate rules and prices for passengers and vehicles. Check the live operation status, check-in instructions and the onward journey from Toi before committing. Do not assume the ferry connects conveniently to every dive departure, or that it operates as a coastal dive shuttle. It is ordinary transport and does not make this peninsula a liveaboard destination. Sources: Suruga Bay Ferry: timetable and fares.

Plan around the same base rather than sending a companion across the peninsula. From an east-coast stay, a chosen Jogasaki walk can work well; from Shimoda, historic streets, cafes and a cultural stop offer a separate day. Shuzenji is a useful dedicated land outing with town and onsen possibilities. Check transport and opening details before setting a meeting time. For shared sightseeing after scuba, account for altitude and hot-bath timing instead of automatically adding a mountain viewpoint or immediate onsen soak. Sources: JNTO: Jogasaki Coast; Shimoda City: Perry Road; JNTO: Shuzenji Onsen.

Plan both activities into the surface interval. DAN advises delaying a hot bath or very hot shower immediately after scuba because rapid warming can increase decompression stress. Flying guidance for asymptomatic recreational divers gives minimum intervals of 12 hours after a single no-decompression dive and 18 hours after repetitive or multiday diving, with longer precautions for other profiles. Your actual dives and health may warrant more conservative advice. Elevated road travel also needs consideration, and possible decompression symptoms require medical evaluation rather than continuing the itinerary. Sources: DAN: hot tubs after diving; DAN: flying after diving.

Call 119 for urgent medical assistance, or 118 for a maritime emergency, and clearly identify the location and diving history. Use the operator's emergency plan and contact a diving medical assistance service after local dispatch. A hospital listing hyperbaric oxygen therapy does not establish an immediately available chamber for recreational decompression illness. Let emergency clinicians determine the receiving facility and transfer. Keep symptoms and dive details available, seek assessment even if symptoms improve, and do not proceed with flying or an unadvised elevated transfer. Sources: JNTO: Japan Visitor Hotline; Japan Coast Guard: maritime emergency 118; Juntendo Shizuoka Hospital: clinical engineering; DAN World: decompression illness.