Noboru Takeshita
Mitsuzuka's first ministerial post was the minister of transport in the cabinet led by Prime Minister Noboru Takeshita. He was in office from 1985 to 1986. Then he was appointed minister of international trade and industry in the same cabinet in a reshuffle on 28 December 1988, replacing Hajime Tamura in the post. Mitsuzuka was in office until 1989.