- 2018/04 - 現在 The University of Tokyo Center for Korean Studies Vice president
- 2015/04 - 現在 東京大学大学院総合文化研究科地域文化研究専攻 教授
- 2018/04 - 2020/03 東京大学大学院総合文化研究科地域文化研究専攻専攻長
- 2014/09 - 2020/03 The Unviersity of Tokyo
- 2016/04 - 2018/03 東京大学大学院総合文化研究科地域文化研究専攻 副専攻長
- 2015/04 - 2018/03 Center for Korean Studies, The Institute of Area and Global Studies, The University of Tokyo Director
- 2013/04 - 2015/03 The University of Tokyo Center for Contemporary Korean Studies Director
- 2011/04 - 2015/03 The University of Tokyo Interfaculty Initiative in Informations Studies Professor
- 2010/10 - 2011/03 The Graduate School of Arts and Sciences, The University of Tokyo Professor
- 1996/04 - 2010/10 The Graduate School of Arts and Sciences, The University of Tokyo Associate Professor
- 2002/09 - 2003/06 Yenching Research Institute, Harvard University Visiting Scholar
- 2000/01 - 2000/12 Asahi Simbun, Asia Network Research Fellow
- 1993 - 1995 Hosei University Faculty of Law
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JAPAN ASSOCIATION FOR COMPARATIVE POLITICS
, International Society for Korean Studies
, Association for Contemporary Korean Studies in Japan
, The Peace Studies Association of Japan
, JAPAN ASSOCIATION OF INTERNATIONAL RELATIONS
, JAPAN ASSOCIATION FOR ASIAN STUDIES
, The Korean Political Science Association
, JAPANESE POLITICAL SCIENCE ASSOCIATION