Haru Nishioka was born on 21 December 1905[1][2] with the surname Ōgushi (大串) in the city of Nagasaki, as the fifth daughter of the ten children of Ichi (イチ) and Ōgushi Kinzaburō (大串金三郎), and at the age of two, she was adopted by his aunt and given the surname Nagano (永野) [3] After graduating from Tamaki Women's School in 1923, she spent one year working as a maid in an asset house for social experience.
[6] In 1950, her husband became Governor of Nagasaki after his ban from political office was lifted, and three years later she was requested by the Liberal Party to run for the national district in the 1953 Japanese House of Councillors election.
[7] Although she declined at first, she decided to run at the recommendation of his husband, Tsuruhei Matsuno, and Eisaku Satō.
[8] She was elected to the House of Councillors, where she served in the welfare and construction committees, helped families of war casualties, enacting the Prostitution Prevention Act, developing a simple water supply on remote islands in Nagasaki Prefecture, and reconstructing the city of Nagasaki.
[9] She also served as both the Liberal Democratic Party's secretary and House of Councillors Accounting Director.