- 2017/04 - 2018/02 Tsinghua University Faculty of Humanities Invited Professor
- 2014/04 - 2016/03 Hitotsubashi University Graduate School of Social Sciences Adjunct Professor
- 2000 - 2014/03 Hitotsubashi University Graduate School of Social Sciences Professor
- 2010 - フンボルト大学日本センター 客員教授
- 2010 - Visiting Professor,Japan Center,Humboldt University
- 2001 - 2002 フンボルト大学日本学研究所 客員研究員
- 2001 - 2002 visiting lecturer ,the Japan Center,Humboldt University of Berlin, Germany
- 2000 - 2001 オスナブリュック大学社会科学部 客員研究員
- 2000 - 2001 visiting researcher ,the Faculty of Social Sciences,University of Osnabrueck, Germany
- 1994 - 2000 Hitotsubashi University Faculty of Social Sciences
- 1994 - 2000 Professor,Faculty of Social Sciences,Hitotsubashi University
- 2000 - - Professor,Graduate School of Social Sciences,Hitotsubashi University
- 1987 - 1994 Hitotsubashi University Faculty of Social Sciences
- 1987 - 1994 Associate Professor,Faculty of Social Sciences,Hitotsubashi University
- 1992 - 1993 ハイデルベルク大学哲学部 客員研究員
- 1992 - 1993 visiting researcher,the Philosophical Seminar,University of Heidelberg, Germany
- 1988 - 1989 ウィーン大学哲学部 客員研究員
- 1988 - 1989 visiting researcher,the Institut of Philosophy,University of Vienna, Austria
- 1981 - 1987 Hokkaido University School of Economics and Business Administration
- 1981 - 1987 Associate Professor
- 1985 - 1986 フンボルト大学経済学部 客員研究員
- 1985 - 1986 visiting researcher ,the Faculty of Economics,Humboldt University of Berlin, East Germany
- 1979 - 1981 Hitotsubashi University Faculty of Social Sciences
- 1979 - 1981 Research Associate,Faculty of Social Sciences,Hitotsubashi University