Hayato Ikeda
Yamazaki was associated with the politically conservative wing of the party after it became the Liberal Democratic Party and was a leading member of the faction led by Mitsujiro Ishii. He served as chairman of the budgetary committee in 1957. In 1960, he was appointed to the cabinet of Prime Minister Hayato Ikeda as Minister of Home Affairs. Yamazaki also served as Chairman of the National Public Safety Commission. He was forced to resign in the aftermath of the assassination of Inejiro Asanuma, president of the Japan Socialist Party during a televised speech.