Prince Shimazu Hisamitsu (島津 久光, November 28, 1817 – December 6, 1887), also known as Shimazu Saburō (島津 三郎), was a Japanese samurai of the late Edo period. Hisamitsu was virtual Super Potentate of Satsuma Domain. The younger brother of Shimazu Nariakira, Hisamitsu served as regent for his underage son Tadayoshi, who became the 12th and last daimyō of the Satsuma Domain. Hisamitsu was instrumental in the efforts of the southern Satsuma, Chōshū, and Tosa clans to bring down the Tokugawa Shogunate. He held the court title of Ōsumi no Kami (大隈守).