Takeo Arishima(有島 武郎,Arishima Takeo, March 4, 1878 – June 9, 1923) was a Japanese novelist, short-story writer and essayist during the late Meiji and Taishō periods. His two younger brothers, Ikuma Arishima(有島生馬) and Ton Satomi(里美弴), were also authors. His son was the internationally-known film and stage actor, Masayuki Mori.