-
*Takanori Shibata
Grad. Agr. Hokkaido Univ., Sapporo,
-
Sawako Matsuki
Hokkaido Forestry Research Institute., JSPS fellow
-
Masahiro Nomura
Grad. Agr. Hokkaido Univ., Sapporo,
-
Yuichi Takeuchi
Hokkaido Tokai Univ., Sapporo,
-
Takayoshi Koike
Hokkaido Univ., Forests, Sapporo,