| 1979 | M.D, Faculty of Medicine, Nagasaki University Instructor at Department of Pathology of Saga Medical College |
| 1981 | Resident, Department of Medicine, Tokyo Women's Medical College on clinical practice of endocrinology |
| 1983 | Instructor, Department of Medicine, Tokyo Women's Medical College |
| 1985 | Ph.D.(Medicine), Tokyo Women's Medical University Research associate at Department of Neuroendocrinology of the Salk Institute in USA |
| 1987 | Instructor, Department of Medicine of Institute of Clinical Endocrinology, Tokyo Women's Medical University |
| 1999 | Assistant Professor, Department of Medicine, Institute of Clinical Endocrinology, Tokyo Women's Medical University |
| 2002 | Professor, Health Services Center, National Graduate Institute for Policy Studies (GRIPS) |