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Miyakejima and Mikurajima

Volcanic Miyakejima diving and carefully managed Mikurajima dolphin swims

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Destination Guide Sources For Miyakejima and Mikurajima

Reference links used to build and maintain this guide.

35 sources • Updated Nov 3, 2026

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

Miyakejima Tourism Association: diving and restricted marine-use areas - Confirms active Miyakejima scuba providers, shore/boat/night formats, geographically restricted scuba, and Megane Iwa June/October access.
Santomo Miyakejima: named dive sites - Operator site-level evidence for Okubohama, Gakkoshita, Togahama, Tsuchikata, Kamanoshiri, Megane Iwa, and the snorkel-only Chotaro-ike; not evidence of automatic access.
Miyakejima Tourism Association: swimming and snorkeling guidance - Identifies Miyakejima swimming areas, currents and rocky-shore hazards, seasonal lifeguards, snorkel gear scarcity, and site-condition checks.
Miyakejima Tourism Association: dolphin swimming from Miyakejima - Miyakejima-based dolphin boats to Mikurajima use trained, wetsuit-equipped open-ocean snorkelers and depend on sea conditions; about one hour each way by local boat.
Mikurajima Tourism Association: dolphin boat rules and approved boats - Primary local claim-level rules: no scuba approach, feeding, touching, pursuit, flash, noise devices or selfie sticks; book with lodging-affiliated certified boat, ~2-hour excursion.
Mikurajima Tourism Association: accommodation directory - Lists scarce on-island lodgings, named guesthouses and boat partnerships, required prebooking and varying room and registration practices.
Mikurajima Tourism Association: general island requirements - Confirms one harbor, unstable landings, no day-tripping, no camping or cycling, small walkable village, and limited cashless infrastructure.
Mikurajima Tourism Association: visitor FAQ - Confirms no scuba at Mikurajima, nature of shallow harbor swimming, 9-seat helicopter booking constraints, clinic and walking transport.
Mikurajima Tourism Association: guided mountain access - Defines required guide for most trails, the unguided Tanteiro exception, Kurosaki Takao closure and published guide price indicative only.
Mikurajima Tourism Association: access - Confirms overnight Tokai Kisen service, potential ferry cancellations, and helicopter as a limited prebooked alternative; schedules subject to updates.
Miyakejima Tourism Association: visitor access - Confirms Tokai Kisen overnight Tokyo route, New Central Airservice Chofu-Miyakejima flights and island shuttle helicopters.
Tokyo Metropolitan Government UMISORA: Miyakejima access and transport - Official metropolitan listing of Miyakejima port, airport, ground bus, rental and taxi options.
Tokyo Metropolitan Government UMISORA: Mikurajima access - Official island-specific ferry and helicopter links and dolphin-tour context, not a guarantee of daily sailings.
Tokai Kisen: current sailing status - Official live operational status source, subject to late decisions and weather; used as a planning check, not a forecast.
New Central Airservice: Miyakejima flight schedule and fares - Current operator source for Chofu-Miyakejima scheduled flights and price variability.
Mikurajima operating dolphin boat Umitonchumaru: 2026 season - Operator 2026 update states March 15-November 15 planned season, accommodation-first booking and July 2026 fare revision.
Tokyo Diving Center: dolphin-tour seasonality - Operator seasonal comparisons, approximate March 15-November 15 local operating window and earlier/later cold-water and storm tradeoffs.
Japan Meteorological Agency: Miyakejima 1991-2020 monthly climate normals - Official monthly air temperature and precipitation climatology for Miyakejima; supports relative season bands rather than daily sea guarantees.
Tokyo Metropolitan Government: Mikurajima dolphin ecology - Official protected-nature source for resident Indo-Pacific bottlenose dolphins and conservation-sensitive April-October viewing.
GO TOKYO: Mikurajima island guide - Tokyo official tourism guide for national-park restrictions, guide-led wildlife/nature visits, and limited island access.
GO TOKYO: Miyakejima island guide - Tokyo official tourism source for volcano, Akakokko birding, lava walking, onsen, scuba and snorkeling; summit area restricted.
Miyakejima Tourism Association: Furusato-no-Yu - Official current attraction page with onsen amenities, hours, and adult admission, subject to seasonal closures.
Miyakejima Tourism Association: 2026 Okubohama campground notice - 2026 notice confirms seasonal campground operation from April 1 through November 30; campground levy comes from linked tourism campground page.
Miyakejima Tourism Association: Okubohama campground rules - Details campsite prebooking, protected land and per-person JPY 500 environmental cooperation contribution.
Miyakejima Tourism Association: local volcano information - Active volcano history and remaining access controls, without inferring unrestricted O-yama access from generic tourism copy.
Miyakejima Tourism Association: 2026 limited volcano guided events - September 2026 publication documents occasional specially permitted guided Mt. Oyama entry, not general public summit access.
Mikurajima Village: clinic and medical contacts - Official local clinic opening and year-round telephone emergency triage contact.
Miyake Village: Central Clinic and evacuation pathway - Official Miyakejima healthcare source describing clinic phone and weather-dependent helicopter transfer to mainland medical centers.
Japan Coast Guard: maritime emergencies 118 - National official maritime emergency number 118.
Japan Ministry of Foreign Affairs: visa exemption - Official nationality-based short-stay visa-exemption policy; not island-specific entry permission.
JNTO: Japan electricity and sockets - Official 100V electrical standard, east Japan 50Hz and adapter guidance.
Miyakejima Tourism Association: 2026 news and closures - 2026 updates including canceled open-water swim event, 2026 campsite season and nature-trail status notices; individual notices must be rechecked.
GO TOKYO: Miyakejima Nature Center Akakokko-Hall - Official attraction listing with nature center hours and indicative general-admission price.
DAN: diving in remote areas - Medical safety authority on remote dive emergency planning, oxygen, evacuation and realistic treatment timelines.
Destination hero photo by さかおり - View of Mikurajima from aircraft. CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). Cropped and resized for the cover. The adapted image is available under the same license.