Eisaku Satō
Hiranuma attended Azabu High School and Keio University, and worked in the private sector at Nitto Boseki from 1962 to 1973. He left to become a political aide for Ichiro Nakagawa and Eisaku Satō. He then ran for a seat in the House of Representatives twice and failed, but was finally elected in 1980 as a member of Japan's Liberal Democratic Party.