Hakuchō Masamune (正宗 白鳥, Masamune Hakuchō; 3 March 1879 – 28 October 1962), born Tadao Masamune, was a noted Japanese critic and writer of fiction, and a leading member of the Japanese Naturalist school of literature.
Source: “Hakuchō Masamune”, English Wikipedia (CC BY-SA 4.0), excerpt