Sources · Destination Guide

Shakotan Peninsula

Columnar rock, cold-water marine life and coastal days from Horomui and Bikuni.

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Research Sources

Destination Guide Sources For Shakotan Peninsula

Reference links used to build and maintain this guide.

60 sources • Updated Nov 3, 2026

Written by DiveJourney. Built from public sources and local operator knowledge. Last updated Nov 3, 2026.

S01 - JNTO: Cape Shakotan diving context - Reviewed 2026-11-03. Supports destination geography, local day boats, winter octopus and Steller sea-lion possibilities, and difficult winter seas. Only Cape Shakotan passages used. National superlatives and other Hokkaido destinations were excluded.
S02 - Aqua Cat: Horomui dive-site profiles - Reviewed 2026-11-03. Supports activities.scuba.signature_sites, published site depths, current exposure and experience-level facets. Site descriptions are not a same-day assessment or permission for independent access.
S03 - Aqua Cat: seasonal marine ecology - Reviewed 2026-11-03. Qualitative seasonal wildlife observations; ambiguous ice-diving and rare-animal claims excluded.
S04 - Aqua Cat: fun diving and rental tariff - Reviewed 2026-11-03. Day-boat tariffs, winter supplement, rentals and signaling requirements; reconfirm prices.
S05 - Aqua Cat: introductory scuba - Reviewed 2026-11-03. Supports a distinct beginner product, advertised minimum age 10, equipment inclusions and beginner facet. Participation remains subject to operator screening and conditions.
S06 - Aqua Cat: facilities and disclosed credentials - Reviewed 2026-11-03. Supports Horomui location, shore facilities, instructor identities and operator-published air-filling/vessel registration details. Current government permit validity and passenger-service authorization were not independently established.
S07 - Aqua Cat: access and gear delivery - Reviewed 2026-11-03. Supports independent arrival at Horomui, approximately two hours by road from Sapporo, longer winter allowance and courier capability. Conflicting street numbers mean the shipping label must be confirmed before use.
S08 - PADI: Aqua Cat resort listing - Reviewed 2026-11-03. Affiliation, languages and activity category only; dedicated freediving delivery unverified.
S09 - Grande Polpo: Shakotan day diving - Reviewed 2026-11-03. Shakotan tariffs, pickup and seasonal subjects; wider routes excluded.
S10 - Grande Polpo: current business notices - Reviewed 2026-11-03. Contains 2026 business/event updates, supporting freshness of the operator presence. Out-of-region events are not included as Shakotan products.
S11 - Grande Polpo: drysuit rental prerequisites - Reviewed 2026-11-03. Operator policy published 2023-12-21 and still linked: certification, documented drysuit experience or concurrent training. Used as a booking check, not a newly verified universal rule.
S12 - DIVE-BiDS: direct Bikuni activity menu - Reviewed 2026-11-03. Supports boat scuba, NAUI introductory/training supply, snorkel plus short cruise, published prices and operator-advertised emergency oxygen/AED. Business publication does not establish a particular departure or audited equipment readiness.
S13 - Shakotan Tourism Association: DIVE-BiDS listing - Reviewed 2026-11-03. Lists the Bikuni business season as April-November. This is not proof that snorkeling runs daily throughout that period or that the operator runs winter trips.
S14 - NAUI Japan: Hokkaido Diving Service and Bikuni base - Reviewed 2026-11-03. Independently corroborates the NAUI-listed operator and its DIVE-BiDS base in Bikuni. Training affiliation is not a government operating permit.
S15 - Hokkaido Scuba Diving Safety Council: members - Reviewed 2026-11-03. Corroborates published industry membership for Aqua Cat, Grande Polpo, DIVE-BIDS and other local suppliers. Membership is not a legal clearance, insurance audit or guarantee of safety.
S16 - Kaiyuu Amigo: current Bikuni services - Reviewed 2026-11-03. Snorkeling product, lodging and tariff; expired coupon excluded.
S17 - Kaiyuu Amigo: boat and beach activities - Reviewed 2026-11-03. Supports guided boat and beach-entry scuba, beach snorkeling and boat access to an inlet. Does not authorize independent use of harbors or shoreline.
S18 - Ocean Days Shakotan: 2026 snorkeling product - Reviewed 2026-11-03. Dated 2026 program, eligibility and tariff; no 2027 schedule verified.
S19 - JMA: Bikuni 1991-2020 climate normals - Reviewed 2026-11-03. Destination-specific land climate supports summer comfort, comparatively drier June and cold winter planning. It does not measure underwater visibility, sea temperature or offshore wave conditions. Month bands are editorial synthesis.
S20 - Shakotan Town: Cape Kamui hours and construction - Reviewed 2026-11-03. Gate hours and tip-path construction restriction.
S21 - Shakotan Tourism Association: November 3 access notice - Reviewed 2026-11-03. November 3 notice: Shimamui, Kamui, coastal-trail access and Ogon parking.
S22 - New Shakotan glass-bottom boat: product - Reviewed 2026-11-03. Supports approximately 40-minute Bikuni sightseeing cruise via Cape Ogon, Gome Island and Takarajima, weather cancellations and reference fares. The evergreen October-end season is overridden by S23.
S23 - New Shakotan: October 15 season-ending notice - Reviewed 2026-11-03. Dated 2026-10-15: high waves canceled that day and the 2026 season ended then. Late April 2027 is a planned restart period, not a confirmed date.
S24 - SHAKOTAN GO: Misaki no Yu - Reviewed 2026-11-03. Official search-indexed operator text supports April-November opening season, usual Wednesday closure and winter shutdown from December. Root page yielded no readable body; hours, price and next opening must be reconfirmed.
S25 - Shakotan Tourism Association: Shimamui viewpoint - Reviewed 2026-11-03. Supports the Cape Shakotan/Shimamui tunnel-and-viewpoint visit. The URL is the association page reached from its Shimamui listing; S21 supplies the current access restriction.
S26 - Shakotan Tourism Association: Cape Ogon - Reviewed 2026-11-03. Supports the Bikuni lookout and walking route. S21 supplies current parking guidance.
S27 - Shakotan Tourism Association: Nakamuraya seafood season - Reviewed 2026-11-03. Supports a local June-August fresh-uni dining cue at Hizukashi. Older undated listing is used for seasonal context, not current opening hours, daily stock or permission to collect seafood.
S28 - Shakotan Town: Shakobus and Bikuni connections - Reviewed 2026-11-03. Supports the replacement of the former Bikuni-Yobetsu Chuo route, Otaru-Bikuni connection, cash fares, prior-day 17:00 reservations on marked trips and the April 1-November 30, 2026 timetable. Do not reuse it as the winter timetable.
S29 - JR Hokkaido: airport trains - Reviewed 2026-11-03. Supports CTS-Sapporo rail access and selected direct services to Otaru, with fastest published journey times. These are rail times, not complete airport-to-dive-base transfers.
S30 - Japan MOFA: short-stay visa exemptions - Reviewed 2026-11-03. Supports nationality/passport-dependent visa exemption and permitted-stay conditions. Page date September 1, 2025; reread on the research date without treating that as a new policy announcement.
S31 - Japan Consulate in Seattle: entry quick facts - Reviewed 2026-11-03. Updated July 8, 2026. Supports passport validity throughout the stay and potential requests for onward/return travel evidence. No universal extra six-month passport rule is asserted.
S32 - Hokkaido Government: accommodation tax - Reviewed 2026-11-03. Supports April 1, 2026 introduction, per-person/night JPY100/200/500 tax bands and accommodation-provider collection. Special statutory exemptions exist.
S33 - Sapporo City: accommodation tax - Reviewed 2026-11-03. Supports additional city tax and combined prefecture/city JPY300/400/1000 bands for Sapporo gateway stays from April 1, 2026. These are combined totals, not amounts added to each other.
S34 - Japan National Tax Agency: international departure tax - Reviewed 2026-11-03. Supports JPY3000 international departure tax, usual carrier collection, exemptions and transitional JPY1000 treatment for eligible tickets issued by June 30, 2026. Applies nationally, not as a Shakotan marine fee.
S35 - Shiribeshi authority: quasi-national park rules - Reviewed 2026-11-03. Supports Niseko-Shakotan-Otaru Kaigan Quasi-National Park administration and zone-specific regulated activities. Does not establish unrestricted access or a universal recreational dive-tag charge.
S36 - Hokkaido Government: Fishing Rules 2026 - Reviewed 2026-11-03. Official current index of fishery, collection-method and harbor-use rules. Used to direct permission checks, not to grant a recreational collection entitlement.
S37 - Yoichi Medical Association: Shakotan clinic - Reviewed 2026-11-03. Supports the municipal clinic in Bikuni, telephone 0135-44-2175 and scheduled general medical care. Does not establish a 24-hour emergency department or recompression capability.
S38 - JNTO: Japan Visitor Hotline and emergency numbers - Reviewed 2026-11-03. Supports 119 ambulance/fire, 110 police and the 24-hour multilingual visitor hotline +81-50-3816-2787. The visitor hotline does not replace emergency dispatch.
S39 - Japan Coast Guard: emergency number 118 - Reviewed 2026-11-03. Supports the domestic 118 number for emergencies and incidents at sea.
S40 - DAN: emergency assistance - Reviewed 2026-11-03. Supports local emergency response first, DAN consultation at +1-919-684-9111 and medical coordination.
S41 - DAN: flying after diving - Reviewed 2026-11-03. Supports minimum preflight intervals for asymptomatic recreational divers, longer conservative margins and no flying with possible decompression illness. These intervals reduce risk but do not guarantee avoidance.
S42 - DAN: freediving safety awareness - Reviewed 2026-11-03. Supports formal training, a capable dedicated buddy and avoiding hyperventilation. Used for activities.freedive and safety, not evidence of Shakotan commercial supply.
S43 - DAN: freediving risk assessment - Reviewed 2026-11-03. Supports site inspection, dedicated rescue cover, emergency action planning and assessment of access, current and sea state before breath-hold sessions.
S44 - DAN: snorkeling and drowning risks - Reviewed 2026-11-03. Supports snorkeling risk assessment for waves, current, boat traffic and health limitations. A surface activity or flotation aid is not a safety guarantee.
S45 - US National Weather Service: cold-water hazards - Reviewed 2026-11-03. Supports thermal protection and the distinction between warm air and immersion risk. General safety guidance only, not a Shakotan weather or sea-temperature source.
S46 - Sapporo official tourism: money - Reviewed 2026-11-03. Supports Japanese yen, gateway card/ATM planning and cash needs. No specific Shakotan ATM uptime or foreign-card acceptance is guaranteed.
S47 - JNTO: electricity - Reviewed 2026-11-03. Supports 100V supply and plug/voltage compatibility advice. S56 establishes Hokkaido frequency and S58 confirms Type A.
S48 - Sapporo Diving Service: certified fun dives - Reviewed 2026-11-03. Supports certification requirement, operator transport and boats, advanced-rank requirement for requested terrain sites and a refresh option. Its wider Hokkaido destinations are excluded.
S49 - JNTO: tipping in Japan - Reviewed 2026-11-03. Supports that routine tipping is not customary. No local per-dive gratuity rate is invented.
S50 - Hokkaido Airports: New Chitose identifiers - Reviewed 2026-11-03. Supports New Chitose Airport identity and CTS/RJCC codes. Business-aviation route graphics are not used as commercial-flight schedules.
S51 - Japan Digital Agency: Visit Japan Web - Reviewed 2026-11-03. Supports online immigration/customs arrival preparation. This service is not a visa or a guarantee of landing permission.
S52 - JNTO: driving in Japan - Reviewed 2026-11-03. Supports license-jurisdiction checks, qualifying 1949 Geneva Convention IDPs and separate specified-license/translation arrangements. Not every international permit qualifies.
S53 - Shiribeshi fisheries authority: anti-poaching notice - Reviewed 2026-11-03. Updated January 29, 2026. Supports restrictions on unauthorized abalone/sea-cucumber collection and fisheries-rights infringements. No harvesting activity is included in the guide.
S54 - DAN: why chamber availability must be arranged - Reviewed 2026-11-03. Supports EMS-led assessment and consultation rather than self-routing to a presumed chamber. No operational Shakotan recompression facility was verified.
S55 - Japan Coast Guard Hokkaido: diving precautions - Reviewed 2026-11-03. Supports checks of forecasts, swell, local depths/currents, buddy arrangements and vessel traffic. Sunny weather alone is not a safe-entry criterion.
S56 - Hokkaido Electric Power Network: frequency - Reviewed 2026-11-03. Supports eastern Japan/Hokkaido 50Hz electricity and equipment-compatibility checks.
S57 - New Chitose Airport: prepaid SIM facilities - Reviewed 2026-11-03. Supports airport connectivity preparation. Does not establish offshore mobile coverage or emergency-call capability for a particular data plan.
S58 - JNTO: practical visitor FAQ - Reviewed 2026-11-03. Supports Type A plugs and language planning. English service must still be confirmed with the individual activity provider.
S59 - Japan Tourism Agency: departure-tax change leaflet - Reviewed 2026-11-03. Official leaflet establishes July 1, 2026 effective date and eligible older-ticket treatment.
Destination hero photo by Jonas Eriksson - Unsplash License. Photographer profile: https://unsplash.com/@jonaseriksson | Location: Cape Kamui, Shakotan, Hokkaido, Japan