- 2012 - 現在 Chuo University Faculty of Law
- 2007 - 2012 Osaka University of Commerce Faculty of Business Administration
- 2006 - 2008 Setsunan University Faculty of Law
- 2006 - 2007 Osaka University of Commerce Faculty of Business Administration
- 2003 - 2006 Osaka University of Commerce Faculty of Business Administration
- 2003 - 2006 Lecturer, Faculty of Business Administration, Osaka University of Commerce
- 2006 - - Parttime Lecturer, Faculty of Law, Setsunan
- 2006 - - Associate Professor, Faculty of Business Administration, Osaka University of Commerce
- 1998 - 2003 Meiji Gakuin University Faculty of Law
- 1998 - 2003 Parttime Lecturer, Faculty of Law, Meiji Gakuen University
- 1996 - 2003 Chuo University Faculty of Law
- 1996 - 2003 Parttime Lecturer, Faculty of Law, Chuo University
- 2000 - 2001 中央大学大学院法学研究科非常勤講師
- 2000 - 2001 Parttime Lecturer, Division of Law, Graduate School, Chuo University
- 1991 - 2001 財団法人都市防犯研究センター主任研究員
- 1991 - 2001 Senior Researcher, Japan Urban Security Research Institute
- 1988 - 1997 Meiji Gakuin University Faculty of Law
- 1988 - 1997 Parttime Lecturer, Faculty of Law, Meiji Gakuen University
- 1986 - 1988 Chuo University Faculty of Law
- 1986 - 1988 Parttime Lecturer, Faculty of Law, Chuo University