Lake Shikotsu

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

• S01: Lake Shikotsu Fisheries Cooperative: lake profile - Checked 2026-11-03. destination.geo_description; overview. Freshwater caldera, lake elevation 248 m, deep cold lake and Chitose gateway. Do not reuse this page's climate generalizations or treat lake depth as a recreational dive profile.
• S02: Chitose City tourism: OCEAN DAYS diving - Checked 2026-11-03. overview; activities.scuba. Official listing corroborates the local business and Shikotsuko Onsen base. Its older seasonal details do not override current operator notices.
• S03: OCEAN DAYS: ordinary Lake Shikotsu fun dives - Checked 2026-11-03. activities.scuba; fees; language; discovery facets. Current regular product, certification, drysuit and Japanese communication requirements, cash payment and seasonal two-dive prices. Route-specific permissions are not published.
• S04: Grande Polpo: guided fun diving - Checked 2026-11-03. activities.scuba; season_planner; fees; discovery facets. Explicit Lake Shikotsu two-beach product and lake-specific summer/winter price bands. May and October are not resolved by the lake table; limited English acknowledged.
• S05: OCEAN DAYS: introductory scuba suspension - Checked 2026-11-03. overview; activities.scuba; faq. Explicit 2026-season suspension takes precedence over unchanged introductory text and navigation advertising.
• S06: OCEAN DAYS: English tours and conservation diving - Checked 2026-11-03. overview; activities.scuba; faq. Cleanup itinerary and special powered-boat authorization are operator claims. Yearless exclusions, current permit validity and quoted cleanup price were not independently verified. English snorkel calendar conflicts with the specific Japanese product.
• S07: OCEAN DAYS: Chitose River snorkeling - Checked 2026-11-03. activities.snorkel; fees; packing. June-November outline, October 11 schedule change, duration, drysuit-fit threshold, age/documentation conditions and published prices. Specific November endpoint is clarified by the activity index.
• S08: Ministry of the Environment: Lake Shikotsu river snorkeling - Checked 2026-11-03. overview; activities.snorkel; season_planner. Identifies OCEAN DAYS, the Chitose River outlet setting, summer/autumn offering, aquatic plants and possible fish observations. A tourism listing does not certify each departure's permissions.
• S09: OCEAN DAYS: current activity index - Checked 2026-11-03. season_planner.tracks.snorkel; faq. River-snorkel card advertises operation until November 15, without an explicit year on that card; confirm the intended season. Trial-scuba card is superseded by the detailed 2026 suspension.
• S10: OCEAN DAYS: ice fun diving - Checked 2026-11-03. activities.scuba; season_planner; safety. Separate January-February ice-related product with beneath-ice wording and winter equipment. Page dated January 5, 2025; a current linked offer, not confirmed 2027 departure or overhead authorization.
• S11: OCEAN DAYS: 2027 ice walk - Checked 2026-11-03. non_diver; season_planner; freedive distinction. Explicit January-March 2027 schedule conditional on suitable ice; drysuit surface activity, not a freediving course.
• S12: Lake Shikotsu Management Council: final bilingual lake rules - Checked 2026-11-03. fees_and_permits; safety_and_conservation; callouts. Final 2022 rules still linked by the current visitor center; both pages reviewed, including image-based page 2. Launch rules apply to craft, not blanket underwater access. No draft blanket swimming ban adopted here.
• S13: Chitose City: Lake Shikotsu water-safety notice, May 1, 2026 - Checked 2026-11-03. activities; callouts.hazards; safety. Abrupt shore drop-offs, cold water in summer, differing shore/offshore wind and waves, flotation and alcohol precautions.
• S14: Chitose City: 2026 powered-boat applications - Checked 2026-11-03. fees_and_permits; conservation. February 1, 2026 notice concerns annually permitted fishing-boat access, not a recreational dive-boat permit.
• S15: Japan Meteorological Agency: Shikotsukohan climate normals - Checked 2026-11-03. season_planner. Station 0037, 1991-2020 monthly air-temperature and precipitation normals. June-September comfort recommendation is a research interpretation, not water-temperature, visibility or closure data.
• S16: Lake Shikotsu Visitor Center: current visitor information - Checked 2026-11-03. non_diver; topside; fees. Seasonal hours and closures, final rules link, No. 5 parking and waterfront-contribution amounts. November 2026 exhibit confirms current maintenance.
• S17: Chitose Tourism Association: Yamasen Railway Bridge - Checked 2026-11-03. activities.topside; non_diver; faq. Pedestrian bridge and riverside park at the lake outlet, about five minutes from the visitor center. Not a water-entry authorization.
• S18: Lake Shikotsu Visitor Center: nature walks - Checked 2026-11-03. activities.topside; non_diver. Local walking information and route context; current closures must be checked separately.
• S19: OCEAN DAYS: winter clear-bottom kayaking - Checked 2026-11-03. activities.topside; non_diver; season_planner. Dedicated winter guided paddling product; route and exposed-lake access depend on conditions.
• S20: Lake Shikotsu Sightseeing Boats: fares and trip duration - Checked 2026-11-03. non_diver; fees; trip_format. Ordinary 30-minute sightseeing circuit with underwater windows; not a dive vessel, ferry transfer or liveaboard.
• S21: Lake Shikotsu Sightseeing Boats: 2026 season-end notice - Checked 2026-11-03. season_planner; non_diver; faq. October 6, 2026 notice: speed/pedal boats end October 25; underwater-window ship ends November 3. Next opening unannounced on research date.
• S22: Kyukamura Shikotsuko: day spa - Checked 2026-11-03. non_diver.wellness_spots; faq. Current day-bathing reception, Tuesday/Wednesday closures, fees and maintenance/capacity caveats.
• S23: Marukoma Onsen: baths and day use - Checked 2026-11-03. non_diver.wellness_spots. Friday-Sunday day use, reception hours, adult fee and lakeside bath facilities.
• S24: Marukoma Onsen: September-December 2026 closure notice - Checked 2026-11-03. non_diver.wellness_spots. Dated operational calendar corroborates the restricted current day-use pattern; later schedules require reconfirmation.
• S25: Chitose Tourism Association: 2027 Lake Shikotsu Ice Festival - Checked 2026-11-03. season_planner; non_diver; fees. January 30-February 23, 2027 dates, daily hours, illumination and weekday/weekend admission difference.
• S26: Lake Shikotsu Visitor Center: access - Checked 2026-11-03. travel; fees. New Chitose and Chitose road distances, Airport 4 bus access, railway transfer logic and ordinary parking fee. Timetable details checked against bus provider.
• S27: Hokkaido Chuo Bus: Chitose timetable effective April 1, 2026 - Checked 2026-11-03. travel; fees; budget facet. Current city-linked 2026 timetable with airport-lake fare and weekday/weekend frequency. Recheck winter revisions; not an October revision.
• S28: Chitose City: current bus timetable directory - Checked 2026-11-03. travel. Directory updated October 5, 2026, links current provider timetables; useful for checking subsequent seasonal revisions.
• S29: Hokkaido Chuo Bus: Shikotsuko return departures - Checked 2026-11-03. travel; faq. Provider route finder, effective April 1, 2026, shows last ordinary return at 17:45 and additional weekend/holiday departures.
• S30: JNTO: New Chitose Airport - Checked 2026-11-03. travel.airports; communications. CTS identity and general airport service categories. Page has older editorial date; no current airline route inventory or service hours inferred.
• S31: Japan Ministry of Foreign Affairs: short-stay visa exemptions - Checked 2026-11-03. travel.entry_requirements_markdown. Passport-specific exemptions and differing permitted stays. Not a universal 90-day entitlement.
• S32: Japan National Tax Agency: International Tourist Tax - Checked 2026-11-03. fees_and_permits. Current JPY 3,000 departure tax, qualifying pre-July 1, 2026 contract exception and exemptions.
• S33: Hokkaido Government: accommodation tax - Checked 2026-11-03. fees_and_permits. In force April 1, 2026; per-person nightly JPY 100/200/500 bands, based on taxable lodging charge.
• S34: Chitose City: accommodation-tax consultation, September 28, 2026 - Checked 2026-11-03. fees_and_permits. City tax still described as under consideration; no separate enacted city levy inferred.
• S35: Chitose City: hot-spring bathing tax - Checked 2026-11-03. fees_and_permits. Standard overnight JPY 150 and day-use JPY 50 with exemptions. Check inclusion in facility charge.
• S36: Chitose City Hospital: Lake Shikotsu Clinic - Checked 2026-11-03. safety_and_conservation.medical_support_markdown. Internal medicine, weekday morning schedule and phone. No evidence of recompression or round-the-clock emergency capacity.
• S37: Chitose City: emergency medical arrangements - Checked 2026-11-03. medical_support; emergency_contacts. Updated October 23, 2026; rotating providers and 24-hour medical-facility information line, not medical consultation.
• S38: JNTO: Japan Visitor Hotline and emergency numbers - Checked 2026-11-03. emergency_contacts; medical_support. 119 ambulance/fire, 110 police, multilingual 24-hour visitor assistance.
• S39: Divers Alert Network: flying after diving - Checked 2026-11-03. safety_and_conservation.dive_safety_markdown; faq. Minimum 18-hour interval for repetitive no-decompression diving; longer intervals reduce risk; do not fly with possible DCS symptoms.
• S40: Divers Alert Network: dive-trip health and safety - Checked 2026-11-03. safety_and_conservation. Postdive ground ascent also increases decompression stress; activate local EMS before dive-emergency assistance.
• S41: Divers Alert Network: freediving safety awareness - Checked 2026-11-03. activities.freedive; safety. Formal training, no hyperventilation, dedicated capable buddy; not evidence of a Lake Shikotsu operator.
• S42: JNTO: currency and international-card ATMs - Checked 2026-11-03. practicalities.currency. Yen and international-card ATM networks. Does not establish availability of a particular lakeside machine.
• S43: JNTO: tipping in Japan - Checked 2026-11-03. practicalities.currency.tipping_markdown. Routine tipping is not expected; exceptional private-guide gratuities are discretionary.
• S44: JNTO: plugs and electricity - Checked 2026-11-03. practicalities.electricity. 100V and Japanese socket guidance; no voltage conversion implied by a plug adapter.
• S45: ENEOS Power: electricity frequencies by prefecture - Checked 2026-11-03. practicalities.electricity. Primary electricity-provider table explicitly places Hokkaido in the 50Hz region.
• S46: Chitose City: 2026 bear-sighting information - Checked 2026-11-03. callouts; activities.topside. Current local alert index includes lake approach and trail areas; historic sightings do not themselves establish an active closure.
• S47: Lake Shikotsu Fisheries Cooperative: himemasu - Checked 2026-11-03. overview; season_planner.encounters; conservation. Introduced landlocked sockeye, local chip name and late-September-November spawning period. No encounter guarantee or unrestricted hatchery access.
• S48: Ministry of the Environment: recognized invasive-species control - Checked 2026-11-03. safety_and_conservation.conservation_markdown. Lake Shikotsu cooperative's signal-crayfish control is a defined program, not permission for visitors to collect or relocate wildlife.
• S49: OCEAN DAYS: bathing snorkel and warming-tent offer - Checked 2026-11-03. activities.snorkel; season_planner; faq. April 5, 2025 page still linked by current activity index; advertises October 16-March 31 sessions. Current departures and exact entry authorization were not established; does not extend the routine river-snorkel season.
• S50: Lake Shikotsu Management Council: conservation contribution - Checked 2026-11-03. fees_and_permits. Published 2026 collection period April 25-November 3, subject to snow; 2027 dates unannounced. Page retrieval was intermittent during research; amounts also corroborated by current visitor-center information.
• S51: Lake Shikotsu Management Council: Minamoa Park tariff - Checked 2026-11-03. fees_and_permits. Minamoa Park, former No. 5 parking: JPY 1,000 per vehicle and separate JPY 500 contribution for junior-high-age and older waterfront users. Facility-specific, not a universal lake tag.
• S52: Japan Meteorological Agency: New Chitose airport identifier - Checked 2026-11-03. travel.airports. Official aviation-weather page identifies New Chitose as RJCC; no current flight-weather data inferred from its illustrative forecast.
• Destination hero photo by Gabriele Girelli - Unsplash License. Photographer profile: https://unsplash.com/@ggirelli | Location: Lake Shikotsu, Chitose, Hokkaido, Japan