| April 1965 | Joined Ministry of International Trade and Industry (MITI) |
| June 1976 | International Bank for Reconstruction and Development |
| February 1990 | Director-General, Economic Cooperation Department, MITI |
| August 1990 | Minister, Embassy of Japan in the United States |
| June 1992 | Deputy Director-General for Global Environmental Affairs, MITI |
| September 1993 | Managing Director, Suntory Ltd. |
| July 2000 | Minister of State and Director-General of Environment Agency |
| January 2001 | Minister of the Environment |
| February 2002 | Minister of Foreign Affairs |
| September 2002 | Minister of Foreign Affairs |