- 2005/04/01 - 現在 Hitotsubashi University Graduate School of Language and Society Professor
- 2018/05 - 2022/05 Hitotsubashi University Graduate School of Language and Society Dean of Graduate School of Language and Society
- 2020/04 - 2021/03 Hitotsubashi University
- 2014/04 - 2016/03 一橋大学 言語社会研究科 評議員
- 2013/04/01 - 2014/03/31 東京大学 文学部・人文社会系研究科 非常勤講師
- 2010/04/01 - 2011/03/31 東京大学 文学部・人文社会系研究科 非常勤講師
- 2009/04 - 2011/03 Hitotsubashi University Information Systems Management Headquarters, Center for Information and Communication Technology Dean of Center
- 2009/04/01 - 2009/09/30 The University of Tokyo College of Arts and Sciences
- 2007/10/01 - 2008/03/31 Tokyo University of Foreign Studies Faculty of Foreign Studies
- 1996/05/11 - 2005/03/31 Hitotsubashi University Graduate School of Language and Society Associate Professor
- 1996/04 - 1996/05 Hitotsubashi University Faculty of Social Sciences
- 1993/04 - 1996/03 Hitotsubashi University Faculty of Social Sciences Assistant Professor
- 1991/10/01 - 1993/03/31 東京芸術大学 音楽学部 非常勤講師
- 1991/10/01 - 1993/03/31 The University of Tokyo Faculty of Letters
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