- 2022/09 - 現在 Gakushuin University Faculty of Letters
- 2022/04 - 現在 The University of Tokyo Graduate Schools for Law and Politics Professor
- 2023/09 - 2024/03 Komazawa University Faculty of Global Media Studies
- 2023/04 - 2023/09 Gakushuin Women's College Faculty of Intercultural Studies Gakushuin Women's College
- 2022/09 - 2023/03 Keio University Faculty of Law
- 2018/09 - 2022/03 The University of Tokyo Faculty of Law
- 2016/04 - 2022/03 Seikei University, Faculty of Law Department of Political Science Professor
- 2018/09 - 2020/03 Gakushuin University Faculty of Letters
- 2016/09 - 2018/09 Universität zu Köln Historisches Institut, Abteilung für Didaktik der Geschichte und Geschichte der Europäischen Integration Gastwissenschaftler
- 2013/04 - 2016/03 Seikei University, Faculty of Law Department of Political Science Associate Professor
- 2012/04 - 2016/03 Gakushuin University Faculty of Law
- 2013/10 - 2014/03 Tsuda College
- 2010/04 - 2013/03 Seikei University, Faculty of Law Department of Political Science Assistant Professor
- 2008/10 - 2010/03 Sapporo Gakuin University
- 2008/04 - 2010/03 Hokkai-Gakuen University
- 2008/04 - 2010/03 Hokkaido University, Graduate School of Law Assistant Professor
- 2007/06 - 2008/02 Hokkaido University, Public Policy School Research Fellow
- 2005/04 - 2007/03 Japan Society for the Promotion of Science (JSPS) Research Fellow
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Japanische Gesellschaft für Deutschstudien
, JAPANESE POLITICAL SCIENCE ASSOCIATION
, JAPAN ASSOCIATION FOR COMPARATIVE POLITICS
, ドイツ現代史研究会
, JAPAN ASSOCIATION OF INTERNATIONAL RELATIONS
, German Studies Association (GSA)
, The Peace Studies Association of Japan
, The European Union Studies Association-Japan
, UACES (The academic association for contemporary European Studies)