- 2024/04 - 現在 Meiji Gakuin University Faculty of law, Department of juridical studies Professor
- 2022/04 - 現在 Meijigakuin University Professor
- 2019/04 - 現在 税務大学校東京研修所 普通科 非常勤講師
- 2019/04 - 現在 Daito Bunka University Department of Law Professor
- 2022/04 - 2024/03 Daito Bunka University Faculty of Law Part-time researcher for university or other academic organization
- 2019/04 - 2022/03 National Tax College in Tokyo General Course
- 2019/04 - 2022/03 Daito Bunka University Faculty of Law, Department of Law Professor
- 2018/04 - 2019/03 Meiji Gakuin University Department of Law Part-time Lecturer
- 2014/04 - 2019/03 Daito Bunka University Faculty of Law, Department of Law Associate Professor
- 2014/04 - 2019/03 Daito Bunka University Department of Law Associate Professor
- 2015/04 - 2016/03 Ludwig-Maximilians-Universität München
- 2012/04 - 2015/03 Meiji Gakuin University Department of Law Part-time Lecturer
- 2011/04 - 2014/03 Daito Bunka University Faculty of Law, Department of Law Lecturer
- 2011/04 - 2014/03 Daito Bunka University Department of Law Senior Lecturer
- 2008/04 - 2011/03 Meiji University Department of Law Research Assistant
- 2007/04 - 2008/03 Meiji University
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