1. Institute of Agriculture Tokyo University of Agriculture and Technology Fuchu Japan
2. Tama Forest Science Garden, Forestry and Forest Products Research Institute Forest Research and Management Organization Hachioji Japan
3. Hokkaido Research Center, Forestry and Forest Products Research Institute Forest Research and Management Organization Sapporo Japan
4. Tohoku Research Center, Forestry and Forest Products Research Institute Forest Research and Management Organization Morioka Japan
5. Forestry and Forest Products Research Institute Forest Research and Management Organization Tsukuba Japan