Things to do · Destination Guide
Bonin-blue reefs, careful wildlife encounters and two islands reached by sea.
Pick an activity mode to compare signature sites, skill fit, and gear planning notes before you lock your trip.
From Chichijima, local day boats reach volcanic reefs, current-swept pinnacles, fish schools and non-penetration wreck viewing; the operators in the village dive listing offer both certified fun dives and introductory experiences. Hahajima is a separate two-hour ferry journey with its own operator, Dive Resort Hahajima, whose fun dives are largely drift-based while discovery dives are normally shore-based. Sites and departures are chosen for conditions, certification, recent experience and conservation restrictions.
Dobuiso, Chichijima
JNTO identifies this eastern Chichijima area for large fish, but currents and the actual itinerary determine access.
Takaiwa, Chichijima
A western Chichijima offshore site highlighted by JNTO for big fish.
Yonhon Iwa (Shihon Iwa), Hahajima
Hahajima local operator maps describe a rock-channel dive with seasonal dogtooth tuna, particularly around spring and early summer.
Wentoro, Hahajima
Dive Resort Hahajima describes coral with relatively little current on this local route, a potential supervised alternative to high-flow offshore dives.
Sawarane, Hahajima
A more demanding drift-prone local reef with sand tiger shark and tuna possibilities; the operator notes current and site timing matter.
Blue Ribbon, Imotojima
Listed on Dive Resort Hahajima's current excursion map; a nearby uninhabited-island boat outing only if the named operator actually runs the route and weather permits.
Houraikon Wreck, Hahajima
The Hahajima operator lists a submerged vessel near the island.
Operator Checklist
Reserve a guided boat with named operators before committing to a sailing. Align Chichijima days with the main ship's arrival/departure cycle and buy a separate Hahajima ferry ticket if changing bases. Share certification, logs and last-dive date; request a shallow check dive after a long break. Ask whether a quoted price includes tanks, weights, rentals, an extra dive, fuel adjustment and an outer-island surcharge. Avoid attempting wreck, arch or cavern penetration without specialist training; stay within no-decompression and altitude/flying-after-diving guidance. Sources: village operators, Hahajima point map, 2026 Chichijima price list.
Conditions Fallback
Avoid