1. Gakushuin University, Faculty of Law, Toshima-ku, Tokyo, Japan
2. Tohoku University, Center for Northeast Asian Studies, Kawauchi, Aoba-ku, Sendai, Japan
3. Waseda University, Organization for Regional and Inter-regional Studies, Shinjuku-ku, Tokyo, Japan
4. National Institute for Environmental Studies, Center for Social and Environmental Systems Research, Tsukuba, Japan
5. Tokai University, School of Marine Science and Technology, Shimizu, Japan
6. International Christian University, College of Liberal Arts, Mitaka, Tokyo, Japan