- 2011/04 - "Professor, Faculty of Commerce, Chuo University"
- 2008/04 - 2011/03 "Professor, College of Economics, Nihon University"
- 2000/04 - 2008/03 "Associate Professor, College of Economics, Nihon University"
- 1999/08 - 2000/03 "Chief Researcher, Resarch Bureau, Economic Planning Agency"
- 1996/08 - 1999/07 "Associate Professor, Graduate School of Policy Studies, Saitama University"
- 1996/08 - 1999/07 Associate Professor, Graduate School of Policy Studies, Saitama University
- 1995/01 - 1996/07 "Deputy Director, Minister's Secretariat, Economic Planning Agency"
- 1993/04 - 1994/12 "Deputy Director, Bureau of National Life, Economic Planning Agency"
- 1992/07 - 1993/03 "Deputy Director, Minister's Secretariat, Economic Planning Agency"
- 1990/04 - 1992/06 "Senior Economist, Research Bureau, Economic Planning Agency"
- 1988/01 - 1990/03 "Officer, Planning Bureau, Economic Planning Agency"
- 1986/04 - 1987/12 "Officer, Cordination Bureau, Economic Planning Agency"
- 1979/03 - 1982/03 "Officer, Ministry of Agricultuer, Forestry, and Fisheries"