1. Forestry and Forest Products Research Institute, Matsunosato 1, Tsukuba 305-8687, Japan
2. Hokkaido Research Center, Forestry and Forest Products Research Institute, Hitsujigaoka 7, Toyohira-ku, Sapporo 062-8516, Japan
3. KITARIN Lab, 2-16-1101 Minami 13-jo Nishi 1-chome, Chuo-ku, Sapporo 064-0913, Japan