36 cave dive sites in Japan.
By area: Kyushu (5), Nagasaki (1) and Okinawa (1).
Recorded maximum depths range from 7 m to 40 m (28 of 36 sites have a depth).
By level: 3 beginner, 1 intermediate and 2 advanced.
Species confirmed at these sites by diver sightings (three or more independent divers) or by two or more independent sources, with the number of sites each is confirmed at.