Business career
1.
1990/04
～
1994/03
Visitor Escorting Task Force the International Hospitality and Conference Service Association (IHCSA)
2.
1997/10
～
1998/10
Research Assistant National Graduate Institute for Policy Studies
3.
1998/10
～
2003/03
Research Fellow National Graduate Institute for Policy Studies Project for Policy Imformation
4.
1998/10
～
2001/03
Research Fellow Tokyo Metropolitan University Faculty of Law, Department of Political Studies
5.
2001/04
～
2004/03
Research associate of the Japan Society for the Promotion of Science
6.
2003/04
～
2004/03
Part-time lecturer Daito Buka University Faculty of Law, Department of Political Studies
7.
2004/04
～
2007/03
Lecturer Daito Buka University Faculty of Law, Department of Political Studies
8.
2004/04
～
2009/03
Part-time lecturer Ferris Women's University Faculty of Global and Intercultural Studies
9.
2004/04
～
2009/03
Part-time lecturer Tokyo Keizai University Faculty of Law
10.
2007/04
～
2011/03
Asocciate Professor Daito Buka University Faculty of Law, Department of Political Studies
11.
2007/04
～
2008/09
Part-time lecturer Hosei Uiversity Graduate School of Political Science
12.
2009/04
～
2010/03
Visiting Fellow London School of Economics Faculty of Iternational History
13.
2010/04
～
2011/03
Part-time lecturer Gakushuin University Faculty of Law, Department of Political Studies
14.
2010/04
～
2014/03
Visiting Fellow Internatioal Research Centre for Japanese Studies
15.
2012/04
～
Professor
16.
2013/04
～
2015/03
Director of Political Science Program Daito Buka University Graduate School of Law, Political Science Program
17.
2015/04
～
2019/03
Part-time researcher for university or other academic organization Gakushuin University Faculty of Law, Department of Political Studies
18.
2015/04
～
2017/03
Director Insititute of Iternational Comparative Political StudiesStudies
19.
2017/04
～
2019/03
Director of Political Science Program Daito Buka University Graduate School, Division of Social Sciences
20.
2018/04
～
Associated Researcher Hiroshima University Archives
21.
2021/04
～
2023/03
Director
22.
2022/04
～
2023/03
Part-time lecturer Aoyama Gakuin University Graduate school Division of Literatures, Department of History
23.
2023/04
～
2024/03
Visiting fellow Internatioal Research Centre for Japanese Studies
24.
2023/04
～
2023/12
Visiting Professor University of Warsaw Faculty of Oriental Studies,Department of Japan Studies
25.
2024/01
～
2024/03
Visiting Professor Academia Sinica Institute of Modern History
26.
2024/04
～
Part-time lecturer Aoyama Gakuin University Graduate school Graduate School, Division of literature and humanities