- 2018/04 - 現在 Seijo University Faculty of Law Professor
- 2016/04 - 2022/09 The Open University Of Japan School of Graduate Studies Visiting Professor
- 2007 - 2018/03 - 北海道大学大学院法学研究科 教授
- 2015/03 - 2015/04 University of Poitiers Faculty of law and social sciences Visiting Professor
- 2003 - 2007 Nanzan University
- 2003 - 2007 Professor,Nanzan University
- 2007 - - Professor,Hokkaido University, School of Law
- 2001 - 2003 Asia University
- 2001 - 2003 Professor,Asia University
- 1999 - 2001 Asia University
- 1999 - 2001 Associate Professor,Asia University
- 1990 - 1999 Otaru University of Commerce
- 1990 - 1999 Associate Professor,Otaru University of Commerce
- 1988 - 1990 Otaru University of Commerce
- 1988 - 1990 Lecturer,Otaru University of Commerce
- 1987 - 1988 Hokkaido University School of Law
- 1987 - 1988 Research Associate,Hokkaido University, Faculty of Law
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Japan Association for Consumer Law
, 仲裁ADR法学会
, 情報ネットワーク法学会
, 日本法社会学会
, 国際消費者法学会(International Association of Consumer Law )
, 日本私法学会
, 日本民事訴訟法学会
, The Information Network Law Association
, The Japanese Association of Sociology of Law
, International Association of Consumer Law
, Japan Association of Private Law
, Japan Association of the Law of Civil Procedure