- 2017/04 - Meiji University of Information and Communication, Graduate School
- 1995/04 - 2017/03 Hosei University Faculty of Law
- 2012/04 - Waseda University
- 2009/04 - 2011/03 慶應義塾大学 メディア・コミュニケーション研究所 メディア法制 非常勤講師
- 2008/04 - Waseda University
- 2006/04 - University of the Sacred Heart Faculty of Liberal Arts
- 1992/04 - 2006/03 Aoyama Gakuin University Faculty of Law
- 2000/10 - 2003/01 Japan Newspaper Museum, Curator
- 1999/04 - 2001/03 Tokyo Keizai University
- 2000/06 - 2000/10 Japan Newspaper Publishers & Editors Association, Researcher
- 1989/07 - 1990/07 Essex Univ., Human Rights Centre, Visiting fellow
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