1. Kyusyu Research Center, Forestry and Forest Products Research Institute, Kumamoto, Japan
2. Department of Social Informatics, Graduate School of Informatics, Kyoto University, Kyoto, Japan
3. Kansai Research Center, Forestry and Forest Products Research Institute, Kyoto, Japan
4. Kohboh Ryukyurobin, Okinawa, Japan
5. Yambaru Green, Okinawa, Japan
6. Incorporated Foundation Okinawa Prefecture Environment Science Center, Okinawa, Japan
7. Department of Forest Vegetation, Forestry and Forest Products Research Institute, Tsukuba, Japan