

Best for intermediate divers, 8-18m, shore & boat entry, mild current.
Nishiumi is a reef site located in Kashiwajima, Japan, offering depths between 8 and 18 metres with an average of 12 metres. Divers can expect visibility ranging from 10 to 25 metres. The site features a mix of reef structures, including rubble and encrusted surfaces. Conditions are generally manageable with mild currents, though localised stronger surges can occur. Entry is possible via both shore and boat. Divers should exercise caution regarding sharp coral and rock formations to avoid injury. Guided tours and air fills are available on-site to assist with navigation and safety.
32.94850, 132.50000
Watch your fins closely around the coral and rock formations, as currents can push you into the reef without warning. Air fills and guided tours are available on site, so booking a guided dive is a practical way to learn where the frogfishes and sharks tend to hold.
Located at 1599 Funakoshi, Ainan-cho, Minamiuwa-gun, Ehime Prefecture.
Recorded at this site
Depth
8-18m
Visibility
10-25m
Skill Level
Intermediate
Entry
Shore & Boat
Water Temp
18-26°C
Current
Mild
Typical Dive
50 min
Best Time
Jun, Jul, Aug, Sep, Oct, Nov
No, this site is rated for intermediate divers due to the potential for strong currents and the need for careful buoyancy control around sharp coral.
The site ranges from 8 to 18 metres deep, with an average depth of 12 metres.
Both shore and boat entries are available at this location.
Divers should be aware of sharp coral and rocks, as well as strong currents that can develop during a dive.
Yes, air fills and guided tours are available on-site.
Diving at Nishiumi in Ainan requires the following certifications: Open Water. Always dive within your training limits.
The best months to visit Nishiumi in Ainan are June, July, August, September, October, and November. Conditions outside these months can still be good but are less predictable.
Nishiumi in Ainan typically has mild currents that most divers can handle comfortably.
Visibility at Nishiumi in Ainan typically ranges from 10 metres to 25 metres. Conditions vary with weather, tides, and seasons.