In the 1960s, Hori served under Eisaku Satō as Minister of Construction and then as Chief Cabinet Secretary.[3] It was during this period that he rose to prominence within the Liberal Democratic Party itself, serving as its Secretary General and also as a senior figure within the Satō faction.[3]
Towards the end of his life, Hori served as Director of the Administrative Management Agency in the Tanaka cabinet, and was Speaker of the House of Representatives of Japan, the latter of which he served until a month before his death. Hori died on 4 March 1979.[3]