| 1995 | Projects Assistant, Middle East and North Africa Region Department II, the World Bank |
| 1997-1999 | Research Fellow, the Japan Society for the Promotion of Science |
| 1999 | Ph. D. in Economics, Osaka University |
| 1999- | Associate Professor, National Graduate Institute for Policy Studies |
| 1999-2001 | Associate Professor, Graduate School of Policy Science, Saitama University |
| 2002 | Visiting Fellow, Economic Growth Center, Yale University |
| 2004-2006 | Visiting Researcher, Institute for Transport Policy Studies |