| 2007 (Jul.) - | Member of the House of Councillors
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| 2006 (Sep.) - | Special Advisor to the Prime Minister (for the Abduction Issue)
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| 2002 - 2004 | Councilor of the Cabinet Secretariat (for the Abduction Issue) |
| 1999 - 2002 | Japanese Ambassador to the Republic of Uzbekistan |
| 1993 - 1999 | Executive Vice President, the Japan Foundation |
| 1978 - 1993 | Ministry of Finance (1993: Deputy Director-General of the Minister's Secretariat)
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| 1975 - 1978 | International Monetary Fund |
| 1966 - 1975 | Ministry of Finance, Japan |
| 1964 - 1966 | Ministry of Foreign Affairs, Japan |