Professor of International Law, at the Graduate School and the Faculty of Law, Doshisha University, Kyoto, since 2007. He received LL.M, from Graduate School of Law, Doshisha University in 1995. Areas of his academic interests are: International Humanitarian Law, Law of Naval Warfare, and International Criminal Law．He has contributed to many books and journals including Japanese Yearbook of International Law, and Journal of International Law and Diplomacy (published by the Japanese Society of International Law) and Japanese Yearbook of International Law. His latest publications in English include "Between Consented and Un-Contested Occupation" Israel Law Review Vol.51, No.3 (2018), to which the Israel Law Review Prize 2018 was awarded. He has cooperated with the Regional Delegate of the ICRC for the Southeast Asia and the Tokyo Office for many years. He was a Visiting Scholar in the Lauterpacht Center for International Law, the University of Cambridge, 2002-2003.