Professor of Law, 1983—, and Dean, 2005—2010, Waseda Law School. President, 2010—, Waseda University. Ad Hoc Member, Legislative Council of the Ministry of Justice. Ad Hoc Member, Industrial Structure Council. Ad Hoc Member, Medical Ethics Council (Medical Ethics Subcommittee Member). Member: Supreme Court Committee, Legal Research and Training. Board Member: Japan Association of Land Law; Japan Association of the Law of Finance; Societe Franco-Japonaise de Science Juridique; Japan Law Foundation; Civil Law Institute; Chairperson: Japan Association of Law Schools.