| 1996.1
      - 2004.3 | 
Associate Professor (as old post name), Faculty of Law, Kumamoto University | 
| 1997.6
      - 2004.3 | 
Part-time Assistant Professor, 熊本研修所, 税務大学校 | 
| 1999.9
      - 2000.8 | 
客員研究員, ロースクール, 米国スタンフォード大学 | 
| 2000.9
      - 2001.3 | 
客員研究員, ロースクール, 米国カリフォルニア大学バークレー校 | 
| 2004.4
      - 2007.3 | 
Associate Professor, Graduate School of Law, Hitotsubashi University | 
| 2006.10
      - 2007.7 | 
客員助教授, -, 独立行政法人大学入試センター | 
| 2007.4
      - 2013.3 | 
Associate Professor, Graduate School of Law, Hitotsubashi University | 
| 2013.4
      -  | 
Professor, Graduate School of Law, Hitotsubashi University | 
| 2020.4
      - 2022.3 | 
Dean, Faculty of Law, Hitotsubashi University | 
| 2020.4
      - 2022.3 | 
Dean of Graduate School, Graduate School of Law, Hitotsubashi University | 
| 2020.4
      - 2022.3 | 
Dean of Center, Graduate School of Law Institute for Global Governance Research, Hitotsubashi University |