Education：
Keio University Graduate School (Apr.1990-Mar.1995)
PhD.
Doctor of Philosophy in Economics

Work Experience：
Research Fellow for The Social Development Research Institute (Apr.1993-Nov.1996)
Research Fellow for National Institute of Population and Social Security Research(Dec.1996-Mar.1997)
Associate Professor for Surugadai University (Apr.1997-Mar.2000)
Associate Professor for Toyo University (Apr.2000-Mar.2005)
Professor for Toyo University (Apr.2005- Mar.2007)
The adviser for the Secretariat of the House of Councilors (Spt.2003-Mar.2006)
Professor for Keio University (Apr.2007- present)
Adviser to the Ministry of Health, Labour and Welfare (Oct 2009-present)