- 2020/04 - 現在 Kanagawa University Faculty of Law
- 2014 - 2020 Liberal Arts Section, the Faculty of Engineering, Professor
- 2007 - 2014 Liberal Arts Section, the Faculty of Engineering, Associate Professor
- 2011 - 2012 参議院第一調査室 客員研究員
- 2009 - 2011 The University of Tokyo Graduate School of Arts and Sciences
- 2007 - 2011 Department of Intellectual Property, the Graduate School of Management of Science and Technology, Tokyo University of Science, Tokyo. Associate Professor
- 2008 - 2009 International Christian University
- 2006 - 2007 US-Japan Program, Weatherhead Center for International Affairs, Harvard University, Cambridge, USA. Academic Research Associate
- 2005 - 2007 Liberal Arts Section, the Faculty of Engineering, and the Department of Intellectual Property, the Graduate School of Management of Science and Technology, Tokyo University of Science, Tokyo. Associate Professor
- 2005 - 2006 Kobe University Graduate School of Cultural Studies and Human Science
- 2004 - 2005 東京大学東洋文化研究科 非常勤講師
- 2001 - 2005 Liberal Arts Section, the Faculty of Engineering, Tokyo University of Science, Tokyo. Lecturer
- 2004 - 2004 the Institute of Defense and Strategic Studies (IDSS), Nanyang Technological University, Singapore. Visiting Fellow
- 1999 - 2001 the Department of International Relations, the Graduate School of Arts and Sciences, the University of Tokyo, Tokyo. Research Associate
- 1998 - 1999 Japanese Society for the Promotion of Science. Post-doctoral Fellow