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Iriomote and Nakano-ogan overview with season and current context.
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.
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Research Estimate At Ogan
Conservative baseline from public research. No community dives logged yet.
AccessChallenging entry effort
CoralMixed health
Aquatic LifeExceptional variety
FacilitiesLimited facilities
CurrentVery strong current
Where Is Ogan?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Ogan Planning Details
Depth range, seasonality, and planning context.
Reported Depth
0m - 40m
Depth Note
The Eastern Root rises from a seafloor around 40m and is defined by fast current.
Best Season
April to November
Typical Conditions
Boat-only, current-driven pelagic site with deep root-like terrain and seasonal winter closures.
Safety & Access At Ogan
Hazards, restrictions, and access requirements.
Key Hazards
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.
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.
Recent Logged Visits At Ogan
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Ogan
Average conditions based on logged dives & visits.
No community dive data has been logged here yet. Be the first to record a dive and seed the averages.
