- 2022/04 - 現在 Toyo University Faculty of Literature Professor
- 2019/04 - 現在 The University of Tokyo College of Arts and Sciences
- 2016/04 - 現在 Ochanomizu University Faculty of Letter and Education Part-time Lectuer
- 2018/03 - 2022/03 Toyo University Faculty of Literature Associate Professor
- 2019/04 - 2020/03 Chiba University Faculty of Letters
- 2017/04 - 2020/03 Waseda University Faculty of Letters, Arts and Sciences Part-time Lectuer
- 2019/04 - 2020/02 Saitama University Faculty of Liberal Arts
- 2016/04 - 2019/03 Yokohama National University Department of Business Administration Part-time Lectuer
- 2016/04 - 2018/03 Shumei University Faculty of Teacher Education Regular Lecturer
- 2015/04 - 2018/03 The Eastern Institute
- 2014/04 - 2018/03 Toyo University Faculty of Literature
- 2015/06 - 2016/03 The University of Tokyo
- 2010/04 - 2016/03 Saitama University Fac. of Liberal Arts Part-time Lecturer
- 2009/04 - 2016/03 Saitama University Fac. of Economics Part-time Lecturer
- 2014/10 - 2015/03 Chiba University Faculty of Letters
- 2012/04 - 2015/03 The University of Tokyo Dept. of Philosophy, Fac. of Literature Assistant Professor
- 2012/04 - 2014/03 Keio University Fac. of Literature Part-time Lecturer
- 2011/04/01 - 2013/03/31 The Open University of Japan Part-time Lecturer
- 2010/04 - 2012/03 The University of Tokyo Dept. of Philosophy, Fac. of Literature Part-time Academic Affairs Staff
- 2007/04/01 - 2010/03/31 The University of Tokyo Dept. of Philosophy, Fac. of Literature Researcher
- 2008/06/01 - 2009/12/31 The University of Tokyo Dept. of Philosophy, Fac. of Literature Research Assistant
- 2005/04/01 - 2007/03/31 The University of Tokyo Dept. of Philosophy, Fac. of Literature Teaching Assistant
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日本ロボット学会
, 白山哲学会
, Seminar on Greek Philosophy
, THE CLASSICAL SOCIETY OF JAPAN
, 西洋古典研究会
, 古代哲学会
, THE SOCIETY OF PHILOSOPHY
, THE PHILOSOPHICAL ASSOCIATION OF JAPAN