Speleological Survey Group of Yamaguchi University - http://sty.sv.cc.yamaguchi-u.ac.jp/~speleo/caveinde.html
Began in 1960 and main explorations have been done in the limestone area of Akiyoshi-dai. Includes photos and contacts. [Japanese and English]. |
Tokyo Speleo Club - http://www.age.jp/~speleo/index-e.html
Meets monthly in Shinjuku. Includes membership requirements, meeting schedule, bulletin board, photos and contacts. [Japanese and English]. |