en.marinediving.com · Operator
Iriomote and Nakano-ogan overview with season and current context.
Ogan
Advanced pelagic root dive off Iriomote
Scuba DivingBoatAdvanced0m - 40m
Reef
Boat-access Iriomote root dive with fast current, deep terrain, and big-fish action.
About Ogan
Ogan is a boat-only dive area off the southern end of Iriomote, centered on the dramatic Eastern Root and other Nakano-ogan sites. The terrain is deep, current-driven, and built for experienced divers who want pelagic action rather than a relaxed reef. Big-fish encounters are the draw here, with tuna, barracuda, whale sharks, and tiger sharks all possible when the water movement lines up.
Safety & Access
Site Conditions
Restricted accessStrong current
Safety Notes
This is not a casual reef site; plan conservatively around current, depth, and timing.
Access Restrictions
Plan for a long boat ride from Iriomote and use a local operator that can time the site for current.
Where Is Ogan?
Featured Operators
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Local Intel For Ogan
Community notes to help plan your visit.
Scuba Diving
A current-driven pelagic dive on dramatic root-like terrain that rewards drift control and big-fish scanning.
Wildlife at Ogan
Species commonly reported at this site, with direct links into their wildlife guides.
Research Estimate At Ogan
Conservative baseline from public research. No community dives logged yet.
Access2/5 · Challenging entry effort
Coral3/5 · Mixed health
Aquatic Life5/5 · Exceptional variety
Facilities2/5 · Limited facilities
CurrentVery strong current
