- 2020/04 - "Chuo University, Faculty of Law, Professor" Professor
- 2013/04 - 2020/03 "Chuo University, Faculty of Law, Associate Professor"
- 2010/10 - 2013/03 "Freiburg University, Faculty of Law, Lecturer"
- 2008/10 - 2010/09 "ETH Zürich, MAS ETH IP Program, Lecturer"
- 2006/03 - "Hoffmann Eitle, Patent Attorneys and Attorneys at Law (Munich, Germany)"
- 2002/05 - 2005/12 "Max Planck Institute for Comparative and International Private Law (Hamburg, Germany), Research Assistant"
- 2003/12 - 2005/11 "Higher Regional Court Hamburg, Legal Traineeship"
- 1996/10 - 2000/02 "Max Planck Institute for Foreign and International Criminal Law (Freiburg, Germany), Assistant"
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Japan Association of Private Law
, German-Japanese Association of Jurists (DJJV)
, German Association for the Protection of Intellectual Property (GRUR)
, Gesellschaft für Rechtsvergleichung (Association of Comparative Law, Germany)