Hamaguchi Osachi (Kyūjitai: 濱口 雄幸; Shinjitai: 浜口 雄幸, also Hamaguchi Yūkō, 1 April 1870 – 26 August 1931) was a Japanese politician, cabinet minister and Prime Minister of Japan from 1929 to 1931. Nicknamed the "Lion Prime Minister" (ライオン宰相, Raion Saishō) due to his dignified demeanor and mane-like hair, Hamaguchi served as leading member of the liberal Rikken Minseitō (Constitutional Democratic Party) during the "Taishō democracy" of interwar Japan; he initially survived an assassination attempt by a right-wing extremist in 1930, but died about nine months later from a bacterial infection in his unhealed wounds.