Sadatarō Hiraoka (Japanese: 平岡定太郎) (July 19, 1863 – August 26,[citation needed] 1942) was the third Director of Karafuto Prefecture (11 June 1908 – 3 June 1914),[1][2] and the 17th governor of Fukushima Prefecture (1906–1908).
[1][2] He was from Harima Province, and was a graduate of the University of Tokyo.
[1][2] Yukio Mishima was his grandchild.
[1][2]