Travel report with boat dive logistics and marine-center facilities.
Boat-access advanced dive site in southern Izu
Toujima is a boat-dived point in Nakagi on the southern tip of the Izu Peninsula, where offshore ridges and the Kuroshio create a changing seascape. The site is known for big-fish action, with turtles, eagle rays, and seasonal hammerhead or sunfish surprises. It suits experienced scuba divers who are comfortable with active water and a short boat run.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
5m - 30m
Depth Note
Offshore ridges top out shallow and drop into the mid-20s to low-30s. The site feels more advanced because of current and wind exposure than because of depth alone.
Best Season
Year-round, with early summer rays, winter whale chances, and sea turtles through the year.
Typical Conditions
Kuroshio-influenced offshore water with seasonal shifts, active current on some days, and changing visibility.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
Wind and current can tighten the site quickly. Use a local operator and keep the dive conservative if the water is moving.
Access Restrictions
Boat access only; experienced divers preferred on current days.
Community notes to help plan your visit.
Scuba Diving
Boat-access ridge dive with multiple routes, channels, and overhangs. Best for buoyant, current-aware divers who like active-water profiles.
Species commonly reported at this site, with direct links into their wildlife guides.
Community dive logs and visit reports for this site.
Average conditions based on logged dives & visits.
Planning answers for access, conditions, timing, and site logistics.
Last Updated
Research Sources
Travel report with boat dive logistics and marine-center facilities.
Official Shizuoka diving guide with Kuroshio and southern Izu context.
Operator page with wind sensitivity, current, coral, and ridge structure.
Izu-wide visibility and seasonal crowding baseline.
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