Research Fellow, the University of Tokyo, Faculty of Law, 1969-1973; Associate Professor, Nagoya University, Faculty of Law(currently Nagoya University School / Graduate School of Law), 1973-1982; Expert in environmental issues, the United Nations Economic and Social Commission for Asia and the Pacific, 1976-1978; Member, "Research Committee on Tort Damage", Office of Cabinet Meeting on Public Enterprise, 1979-1980; Visiting Fellow, Harvard University Yenching Institute, 1980-1981; Columbia University School of Law, 1981-1982; Professor, Nagoya University Faculty of Law (currently Nagoya University School / Graduate School of Law), 1982-2007; Visiting Professor, University of Hawaii, 1985-1985, Columbia University School of Law, 1986-1987; Family Conciliator, Nagoya Domestic Court, 1988-2004; Deputy Delegate of Japanese government and Member of the Drafting Committee, Diplomatic Conference on Adoption of "UNIDROIT Convention on International Financial Leasing" and "UNIDROIT Convention on International Factoring", 1988; Civil Arbitrator, the Nagoya District Court and the Nagoya Summary Court, 1989-2007; Visiting Professor, Beijing University, 1991; Member, "Disciplinary Committee", Aichi Bar Association, 1991-2007; National Bar Examiner, 1993-1995; Member, "Labor Relations Law Research Council", the Ministry of Labor (currently the Ministry of Health, Labor and Welfare), 1996-1998; Visiting Fellow, University of London, 1996-1997; Member, "Legislative Council Civil Law Subcommittee", the Ministry of Justice, 1998-2000; Testimony, Special Council on "Debt Disposal of Japanese National Railways Settlement Corporation and National Forestry Services Reform Grant", Lower House, 1998; Testimony, Special Council on "Debt Disposal of Japanese National Railways Settlement Corporation and National Forestry Services Reform Grant", Upper House, 1998; Chairman, "Participative Committee of Labor Disputes", Aichi Labor Bureau, the Ministry of Labor (currently the Ministry of Health, Labor and Welfare), 1998-2005; Chairman, "Committee on Amendment of Railway Business Act", the Ministry of Transport (currently, Ministry of Land, Infrastructure and Transport), 1999-2000; Chairman, "Bidding Surveillance Committee", the Fifth Harbor and Port Bureau, the Ministry of Transport, 1999-2005; Deputy Chairman, "Bidding Surveillance Committee", Chubu Regional Development Bureau, the Ministry of Land, Infrastructure and Transport, 1999-2005; Member, "Law School Improvement Committee", Shinshu University, 2006—; Collaborative Researcher, International Research Center for Japanese Studies, 2006-2007; Vice Chairman, "Project Appraisal Surveillance Committee", Chubu Regional Development Bureau, the Ministry of Land, Infrastructure and Transport, 2006—; Cooperative Member, Science Council of Japan, 2006—; Member, "Assistance Committee for Improvement on Laws and Regulations in Uzbekistan", Japan International Cooperation Agency, 2006-2007; Member, Research Committee on Civil Code Amendment, 2006-2009; Professor, Sophia University Law School, 2007—.