-
Koji Okumura
Graduate School of Letters, Hiroshima University
-
Akira Ono
Archaeology Laboratory, Tokyo Metropolitan University
-
Hisao Kumai
1-800-1-204 Kusabe, Nishi-ku, Sakai, Osaka
-
Hiroshi Machida
15-7 Shiratoridai, Aoba-ku, Yokohama
-
Kiyohide Mizuno
Institute of Geology and Geoinformation, Geological Survey of Japan, AIST