Hamaguchi Osachi (Kyūjitai: ; Shinjitai: , also Hamaguchi Yūkō, 1 April 1870 – 26 August 1931) was a Japanese politician, cabinet minister and Prime Minister of Japan from 1929 to 1931. He initially survived an assassination attempt in 1930, but died about nine months later from a bacterial infection caused by his unhealed wounds. 