-
*Tsutomu Yamada
Graduate School of Science, Tohoku University
-
Masahiro Tomitsuka
Graduate School of Science, Tohoku University
-
Hiroki Matsuda
Graduate School of Science and Technology, Kumamoto University
-
Kazuhisa Yoshimura
Faculty of Science, Kyushu University
-
Toshio Kikuchi
Higashiyama Caving Club