

Best for advanced divers, Up to 19m, boat entry, strong current.
Nakanougan-jima is a drift reef located 15 kilometres off Ishigaki Island. This site is suitable for advanced divers comfortable managing strong currents while exploring depths down to 19 metres. Visibility is consistently 26 metres, providing clear views of the reef structure and surrounding open water. The site supports a variety of reef fish and invertebrates typical of the region. Due to the strong currents and potential for boat traffic, divers must use a surface marker buoy and coordinate closely with their boat operator. Water temperatures range from 24 to 30 degrees Celsius throughout the year. Night diving is permitted at this location.
24.19300, 123.56310
Current here is consistently strong, so confirm the tide window with your boat operator before descending and keep a surface marker buoy ready for the ascent. Watch for boat traffic at the surface, particularly when drifting away from the reef structure.
Access is only possible by diving boat or chartered boat from Iriomote Island, taking about one hour from Uehara Port.
Recorded at this site
Depth
Up to 19m
Visibility
26m
Skill Level
Advanced
Entry
Boat
Boat required
Water Temp
24-30°C
Current
Strong
The site supports a variety of reef fish and invertebrates typical of the region's habitat.
No, this is an advanced site due to the strong currents that characterise the drift.
The site reaches depths of up to 19 metres.
Boat access is required for this site, which is located 15 kilometres from the shore.
Divers should be aware of strong currents, potential boat traffic at the surface, and sharp coral or rock formations.
Diving at Nakanougan-jima in Iriomote Island requires the following certifications: Advanced. Always dive within your training limits.
A 3mm wetsuit is recommended for diving at Nakanougan-jima in Iriomote Island. Water temperatures range from 24°C to 30°C.
Nakanougan-jima in Iriomote Island can have strong currents. Advanced experience with drift diving and current navigation is recommended.
Visibility at Nakanougan-jima in Iriomote Island typically ranges from 26 metres to 26 metres. Conditions vary with weather, tides, and seasons.