| September 2006 | Minister of Agriculture, Forestry and Fisheries |
| September 2005 | Elected to the HR（House of Representatives) (44th General Election） |
| November 2003 | Elected to the HR（House of Representatives) (43rd General Election） |
| January 2001 | Senior Vice-Minister of Agriculture, Forestry and Fisheries (until April 2001) |
| January 2001 | Senior Vice-Minister of Agriculture, Forestry and Fisheries |
| December 2000 | Senior State Secretary for Agriculture, Forestry and Fisheries |
| June 2000 | Elected to the HR（House of Representatives) (42nd General Election） |
| October 1999 | Chairman, Standing Committee on Agriculture, Forestry and Fisheries, HR（House of Representatives) (until June 2000) |
| October 1996 | Elected to the HR（House of Representatives) (41st General Election） |
| August 1995 | Parliamentary Vice-Minister of Ministry of Agriculture, Forestry and Fisheries (until January 1996) |
| July 1993 | Elected to the HR（House of Representatives) (40th General Election） |
| February 1990 | Elected to the HR（House of Representatives) (39th General Election） |
| March 1988 | Left The Ministry |
| August 1986 | Senior Official for Public Relations, Administration Division, Forest Policy Planning Department, Forestry Agency (until March 1988) |
| August 1985 | Assistant director, Planning Division, Private Forest Department, Forestry Agency |
| August 1978 | Director, Teshio District Forest Office |
| April 1969 | Entered Ministry of Agriculture and Forestry |
