Yamakoshi, Kazuo (Tokyo Univ. Japan)
Ohashi, Hideo (Tokyo Univ. Japan)
Noma, Motosaku (Yamagata Univ. Japan)
Sakurai, Hirohisa (Yamagata Univ. Japan)
Nakashima, Kazuo (Yamagata Univ. Japan)
Nogami, Kenichi (Dokkyo Univ. Tochigi, Japan)
Omori, Rie (Dokkyo Univ. Tochigi, Japan)