 At academic societies, he is a director of the Association for Contemporary Korean Studies in Japan, and Japanese Association of Modern East Asian Studies.He was also a director of the Japanese Association for Comparative Politics, research collaborator of the sub-committee on the modern history at the First Japan-Korea Collaborative History Research Committee , which was established by the agreement between Japanese Prime Minister Junichiro Koizumi and South Korean President Kim Dae-jung in 2001.He became a full committee member of the Second Japan-Korea Collaborative History Research Committee, which was established by another agreement of both governments in 2005.