- 2020/03/01 - 現在 Northeastern University School of Law The Center of Law, Innovation, and Creativity (CLIC) Visiting Lecturer
- 2013/04/01 - 現在 Professor, Department of Policy Management, Keio University
- 2007/04 - 現在 Adjunet Researcher, IICP
- 2001/04/01 - 2015/03/31 Lecturer Meiji Univ.
- 2009/04/01 - 2013/03/31 Associate Professor, Department of Policy Management, Keio University
- 2008/04 - 2013/03 Lecturer, Komazawa Univ.
- 2004/04 - 2007/03 Adjunet Researcher, RITE
- 2002/11 - 2004/03 Associate Professor, Institute of Library and Information Science, University of Tsukuba
- 2002/04 - 2003/03 Lecturer Heisei International Univ.
- 2001/04 - 2003/03 Lecturer, Nishogakusha Univ.
- 2001/11 - 2002/10 Researcher, JIPDEC
- 1999/03/01 - 2001/03/31 Researcher, Research Institute of Telecommunication and Economics
- 2000/04 - 2000/08 Lecturer, Himeji Dokkyo Univ.
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Constitutional Law Society
, Law and Computers Association of Japan
, The Japan Society of Information and Communication Research
, The Information Network Law Association
, 日本公法学会
, 情報処理学会
, 電子情報通信学会
, 人工知能学会
, 情報法制学会