Noboru Takeshita
Ota entered politics in 1980 with the help of his father-in-law, the governor of Fukuoka. He has since been involved mainly in economic policy. Under Noboru Takeshita in the late 1980s, he advocated the introduction of the consumption tax. Ota also participated in changes in the Commercial Law in the late 1990s and realignment of government ministries and agencies in 2001. Ota left the LDP in 1994 to form a small party, but returned to the LDP the following year.