- 2005-present Professor, Faculty of Business and Commerce, Keio University
- 2000f-2002s Visiting Scholar, Sloan School of Management, MIT
- 1996-2004 Associate Professor, Faculty of Business and Commerce, Keio University
- 1989-1992 Researcher, Management Planning Division, Nomura Research Institute, Co. Ltd.
- 1995 Ph.D. , Graduate School of Engineering, University of Tokyo
- Thesis:"Why word-of-mouth affect Consumer's Decision Making?" [in Japanese]
- 1989 M. E. in Nuclear Engineering, Graduate School of Engineering, Department of Nuclear Engineering, University of Tokyo, Japan
- 1987 B. E.in Applied Physics, Faculty of Engineering, Tohoku University, Sendai, Japan