- 2022/01 - 2028/01 Member of the ICSID Panel of Arbitrators
- 2021/09 - 2022/09 University of Cambridge Lauterpacht Centre for International Law Visiting Fellow
- 2016 - 2016 Assistant, International Law Commission 68th session
- 2014 - 2014 Visiting Professor, Law School, Far Eastern Federal University
- 2013 - 2014 Capacity Building Seminar Lecturer (WTO Dispute Settlement, Trade Remedies, Trade and Environment)
- 2012 - 2013 Assistant Legal Counsel, Permanent Court of Arbitration (PCA)
- 2011 - 2012 Visiting Fellow, Graduate Institute of International and Development Studies
- 2011/04 - Professor, Waseda University
- 2006/04 - 2011/03 Associate Professor, Waseda University
- 2002 - 2010 Capacity Building Seminar Lecturer (WTO Dispute Settlement, Trade Remedies, Trade and Environment)
- 2008 - 2008 WTO Lecturer for METI officials(2008, 2010)
- 2005/04 - 2006/03 Assistant Professor, Waseda University
- 2000/09 - 2005/03 Assistant Professor, University of Shizuoka
- 2003 - 2003 Summer Program Lecturer, World Trade Institute (Joint Center of the Universities of Berne, Fribourg and Neuchatel
- 2002 - 2002 Visiting Professorial Fellow, Institute of International Economic Law, Georgetown University Law Center
- 2002 - 2002 Intern, Appellate Body Secretariat, World Trade Organization
- 2001 - Admission to the New York State Bar
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Society of International Economic Law
, Asian Society of International Law
, American Society of International Law
, Japanese Association of World Law
, International Law Association, Japan Branch
, Japanese Society of International Law
, Japan Association of International Economic Law