1. Faculty of Life and Environmental Sciences, University of Tsukuba
2. Graduate School of Agricultural and Life Sciences, The University of Tokyo
3. Faculty of Symbiotic Systems Science, Fukushima University
4. Graduate School of Agriculture, Tokyo University of Agriculture and Technology
5. Civil Engineering Research Institute for Cold Region, Public Works Research Institute
6. Japan Conservation Engineers & Co., Ltd.
7. Graduate School of Life and Environmental Science, Kyoto Prefectural University