| 1965, 1974 |
Law Faculty, Kyushu University Law School (M.A., 1965; Dr., 1974) |
| 1965 |
Assistant in Law Faculty, Kyushu University |
| 1967 |
Lecturer at Law Faculty, Seinan Gakuin University |
| 1972 |
Professor at Law Faculty/Graduate Scholl, Seinan Gakuin University |
| 1982 |
Professor at Law Faculty/Graduate Scholl, Sophia University |
| 2003 |
Professor Emeritus, Sophia University |
| 2003 |
Professor at Law School, Sophia University (additional post) |
| 2005 |
Professor at Sophia University Graduate School of Global Environmental Studies (additional post) |
| 2007 |
Admitted to Daini Tokyo Bar Association |
| 2007 |
Board Chairman, Grobal Environmental and Economic Studies Institute(NGO) |