| Mineichi Iwanaga | |
| Native Name Lang: | ja |
| Primeminister: | Junichiro Koizumi |
| Term Start: | 11 August 2005 |
| Term End: | 31 October 2005 |
| Predecessor: | Junichiro Koizumi (acting) |
| Successor: | Shōichi Nakagawa |
| Office2: | Member of the House of Representatives |
| Term Start2: | 21 October 1996 |
| Term End2: | 21 July 2009 |
| Constituency2: | Shiga 3rd (1996–2003) Shiga 4th (2003–2009) |
| Predecessor2: | Constituency established |
| Successor2: | Tenzo Okumura |
| Birth Date: | 5 September 1941 |
| Birth Place: | Kōka, Shiga, Japan |
| Party: | Liberal Democratic |
| Alma Mater: | Chuo University |
Mineichi Iwanaga (岩永峯一 Iwanaga Mineichi, born September 5, 1941) is a Japanese politician.
Born in Koka, Shiga Prefecture, Iwanaga attended Koka Senior High School and graduated from the law faculty of Chuo University.
After serving as a town council member in Shiga, Iwanaga was elected to the House of Representatives in 1996, representing the fourth district of Shiga. He joined the Kato faction of the Liberal Democratic Party, but later switched to the Horiuchi faction. He became Vice Minister of Agriculture under the first Koizumi cabinet.[1]
On August 11, 2005, Iwanaga became Minister of Agriculture following the resignation of Yoshinobu Shimamura.