1. Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, Japan
2. Department of Anthropology and Curator for Archaeology, Museum of Anthropology, University of Denver, Denver, USA
3. Graduate School of Horticulture, Chiba University, Chiba, Japan
4. University of Tokyo Forests, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
5. Faculty of Global and Regional Studies, University of the Ryukyus, Nakagami, Japan
6. School of Environmental Science, Nagasaki University, Nagasaki, Japan