| March 1960 | Graduated from Departments of Economics, Faculty of Politics and Economics, Gakushuin University |
| March 1960 | Entered Daiwa Securities Co., Ltd (until March 1963) |
| April 1963 | Entered Odakyu Department Store Co., Ltd |
| June 1990 | Councillor, Gakushuin School Corporation (until March 2001) |
| May 1991 | Director, Chief of Nishi-Shinjuku Development Office and Accounting Manager, Odakyu Department Store Co. Ltd (until May 1995) |
| May 1991 | Councillor, Gakushuin Oyu-kai (Alumni Association) (until May 1999) |
| Nov 1992 | Trustee, Gakushuin School Corporation (until March 2001) |
| May 1995 | Vice-chairman, Gakushuin Parents’ Association (until May 1999) |
| May 1995 | Executive Managing Director, General Manager of Corporate Planning Department, Odakyu Department Store Co., Ltd (until May 1997) |
| May 1997 | President & CEO, Odakyu Planet Co., Ltd. (until May 1999) |
| May 1999 | Chairman, Gakushuin Parents’ Association (until May 2001) |
| July 1999 | Chairman & CEO, Rising Sun Security Service Co., Ltd (until Sep. 2013) |
| May 2001 | Trustee, Gakushuin Oyu-kai (Alumni Association) (until Sep. 2002) |
| Nov 2001 | Chairman of Alumni of Faculty of Economics, Gakushuin University (April 2014, Honorary Chairman) |
| June 2002 | Councillor, Gakushuin School Corporation (until Sep. 2002) |
| Sep 2002 | Executive Director, Gakushuin School Corporation (until Sep. 30, 2011) |
| March 2006 | Deputy Chancellor/President, Gakushuin School Corporation (until May 2006) |
| Nov 2012 | Executive Director, Kasumi Kaikan (incumbent) |
| Oct 2013 | Special Advisor, Rising Sun Security Service Co., Ltd. (incumbent) |
| May 2014 | Councillor, Gakushuin School Corporation (incumbent) |
