- 2023/04 - 2025/03 Food and Agriculture Research Institute(Comprehensive Research Organization) chief
- 2007 - Waseda University, Faculty of pedagogy, department of Multi-disciplinary Stady on Cultures, Professor
- 2002 - 2002 Waseda University, Faculty of pedagogy, Professor
- 1996 - 2002 Waseda University, Faculty of pedagogy, Assistant professor
- 2002 - Waseda University, Faculty of pedagogy, Professor
- 1995 - 1996 Waseda University, Faculty of pedagogy, Full-time lecturer
- 1993 - 1995 Ryutso Keizai University, Faculty of economics, Assistant professor
- 1989 - 1994 International Christian University, language department, part-time lecturer
- 1991 - 1993 Ryutsu Keizai University, Faculty of economics, Full-time lecturer
- 1989 - 1993 Meijigakuin University, Part-time lecturer
- 1989 - 1993 Waseda University, Faculty of Literature, Part-time lecturer
- 1990 - 1991 Aoyamagakuin University, Part-time lecturer