Dedicated dive boat and port-side staging facilities.
Boat-diving terrain site on Tajiri's Sea of Japan coast.
Boat-diving terrain site on Tajiri's Sea of Japan coast.
Tajiri is a Sea of Japan coast dive site on Tottori's eastern edge, set in the San'in Kaigan geopark with rocky relief that carries into the water. The dive points are a mix of caves, channels, and steep terrain reached by boat, so route choice matters as much as depth. It is a strong fit for divers who like topography, current-aware planning, and fishy coastal water rather than a coral reef. Clownfish, seahorses, octopus, and schooling jackfish are among the better-known marine life signals.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
5m - 33m
Depth Note
Representative points range from shallow cave routes around 5 m to offshore points around 33 m, and boat access is the norm.
Best Season
Late spring through autumn is the easiest window; winter can still be rewarding underwater when sea state allows.
Typical Conditions
Complex rocky terrain, caves, channels, and point-specific current. Some sites are sheltered, while offshore points can run enough to favor experienced divers.
Site conditions, restrictions, and access requirements.
Site Conditions
Safety Notes
The site includes caves and holes; use appropriate training, lighting, and avoid entering overhead areas without proper planning and equipment.
Access Restrictions
Boat-only or boat-first access from Tajiri Port; point choice depends on weather and current.
Legal Notes
Follow operator and harbor rules; some points are condition-dependent and do not run every day.
Community notes to help plan your visit.
Scuba Diving
Known for terrain features such as waterways, horizontal holes, and near-surface caves.
Freediving
Not a primary freedive site; the boat logistics and point-specific current make it better suited to scuba.
Snorkeling
Possible only in the calmest shallow areas; the site's real appeal is the terrain below the surface.
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
Dedicated dive boat and port-side staging facilities.
Boat entries, complex routes, and representative point depths.
Boat-dive main mode, point depths, current, and seasonal conditions.
Blue Line Tajiri operator profile and Sea of Japan dive context.
San'in Kaigan geopark context and point-level underwater features.
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