Professional Experience: Research Assistant, The University of Tokyo, 1978-1981; Ministry of Foreign Affairs, 1982-1984; Research Assistant, Meiji University, 1983-1984; Associate Professor, The University of Tokyo, 1984-1996; Visiting Scholar, Law School, University of Michigan, 1987-1988; Visiting Scholar, School of Law, Columbia University, 1988-1989; Professor, The University of Tokyo, 1996-2004; Visiting Professor, Waseda University Law School, 2004-2005; Visiting Professor, The University of Tokyo, COE Program, 2004-2008; Professor, Waseda University Law School, 2005—.