| 1998.4
      - 1999.3 | Postdoctoral Fellow of Japan Society for the Promotion of Science, -, Japan Society for Promotion of Science | 
| 1999.4
      - 2001.3 | Assistant Professor, Faculty of Law, Asia University | 
| 2001.4
      - 2003.3 | Associate Professor (as old post name), Faculty of Law, Asia University | 
| 2003.4
      - 2009.9 | Associate Professor (as old post name), International Graduate School of Social Sciences, Yokohama National University | 
| 2009.10
      - 2013.6 | Associate Professor, Graduate School of Law, Hitotsubashi University | 
| 2013.7
      - | Professor, Faculty of Law, Hitotsubashi University | 
| 2013.7
      - | Professor, Graduate School of Law, Hitotsubashi University | 
| 2023.4
      - | Professor, Hitotsubashi Institute for Advanced Study, Hitotsubashi University |