| 1950 | Entered the service of the Ministry of Labor |
| 1974 | Appointed Director-General of the Women and Minors Bureau, the Ministry of Labor |
| 1980 | Resigned from the Ministry of Labor |
| 1980 | Elected to the House of Councillors |
| 1984 | Senior State Secretary for Foreign Affairs |
| 1985 | Attended the World Conference on United Nations Decade for Women as Head of the Japanese Delegation (Nairobi, Kenya) |
| 1986 | Re-elected to the House of Councillors |
| 1987 | Chairman, Standing Committee on Foreign Affairs, House of Councillors |
| 1989 | Appointed Minister of State (Director-General of the Environment Agency) |
| 1989 | Chief Cabinet Secretary (Minister of State) |
| 1992 | Elected to the House of Councillors for the third time |
| 1992 | Appointed Minister of Education |
| 1996 | Elected to the House of Representatives |
| 1997 | Deputy Chairman, General Council, Liberal-Democratic Party |
| 1998 | Deputy Chairman, Policy Research Council, Liberal Democratic Party |
| 2000 | Re-elected to the House of Representatives |
| 2000 | Chairman, Research Commission on the Education System,Liberal-Democratic Party |
| 2000 | Acting Chairman, General Council, Liberal-Democratic Party |
| 2001 | Appointed Minister of Justice |
| 2002 | Appointed Minister of Justice |
