Beach and camp listing used for swell and facility context.
Japan · Miyakejima and Mikurajima
Okubo Hama is Miyakejima's main lava-root beach dive.
Okubo Hama is Miyakejima's main lava-root beach dive.
Okubo Hama is Miyakejima's main shore dive, reached from a black-gravel beach on the island's north side. The lava-root terrain spreads east and west from the entry, so the site works best one sector at a time rather than as a full circuit. Shallow water above the roots holds coral pockets and dense fish life, while the overhang gives macro subjects a sheltered nook. It is at its best on settled days, when the bay stays calm and the entry is easier.
Site Conditions
Safety Notes
A large overhang is present; maintain appropriate clearance and buoyancy around the overhead feature.
Legal Notes
Stay within Miyakejima's designated diving areas and avoid restricted zones.
Community notes to help plan your visit.
Scuba Diving
The dive runs over lava roots that spread east and west, so most sessions work best as one focused sector rather than trying to cover the whole site.
Snorkeling
The shallow frontage can work for calm-day snorkeling and slow fish watching near the beach, but the entry still needs care.
Species commonly reported at this site, with direct links into their wildlife guides.
Conservative baseline from public research. No community dives logged yet.
Last Updated
Research Sources
Beach and camp listing used for swell and facility context.
Directory overview of Miyakejima dive sites and conditions.
Local operator page for the north-side site and fish life.
Island diving rules and designated-area guidance.

Sanbondake is a boat-access drift reef off Miyakejima.

Mikurajima Island is a guided wild-dolphin swim site with boat access.

Aki no Hama is a beach-entry macro dive point on Izu Oshima.