- 2017/04 - 現在 Graduate School of Arts and Sciences, International Christian University Professor
- 2009/04 - 現在 International Christian University College of Liberal Arts Division of Arts and Sciences Professor
- 2005/04 - 現在 Professor
- 2014/04 - 2016/03 国際基督教大学 大学院公共政策・社会研究専攻 教授
- 2014/04 - 2016/03 Professor
- 2013/12 - 2014/02 The Universitat Jaume I of Castellón Economics Department Professor
- 2013/12 - 2014/02 The Universitat Jaume I of Castellón Economics Department Visiting Professor
- 2011/04 - 2013/03 , International Christian University Graduate School of Arts and Sciences
- 2010/04 - 2012/03 Chair, Dept. of Economics and Business, International Christian University Professor
- 2007/08 - 2008/08 ETH Zurich Department of Management, Technology and Economics Professor
- 2007/08 - 2008/08 ETH Zurich Department of Management, Technology and Economics Visting Professor
- 2000/04 - 2005/03 Associate Professor
- 2000/10 - 2001/08 University of Kiel, Department of Economics, Germany
- 2000/10 - 2001/08 University of Kiel, Department of Economics, Germany Visiting Professor
- 1994/09 - 2000/03 Associate Professor
- 1993/09 - 1994/08 University of Southern California, Department of Economics Department of Economics Researher Postdoc
- 1993/09 - 1994/08 University of Southern California, Department of Economics Department of Economics Visiting Research fellow
- 1993/04 - 1994/08 東京大学 経済学部 日本学術振興会特別研究員
- 1993/04 - 1994/08 Special researcher of the Japan Society for the Promotion of Science