1. SOKENDAI (The Graduate University for Advanced Studies), Department of Evolutionary Studies of Biosystems, Shonan Village, Hayama, Kanagawa 240-0193, Japan
2. Tama Forest Science Garden, Forestry and Forest Products Research Institute, 1833-81, Todori, Hachioji City, Tokyo 193-0843, Japan
3. Chuo University Junior and Senior High School, 3-22-1, Nukuikita Town, Koganei City, Tokyo 184-8575, Japan