Yoshiki Hayama (葉山 嘉樹 Hayama Yoshiki, March 12, 1894 - October 18, 1945) is a Japanese author associated with the Japanese proletarian literature movement. He is perhaps best known for Men Who Live on the Sea 海に生くる人々, a novel about the appalling labor conditions on factory ships, and for short stories such as The Prostitute 淫売婦(imbaifu), an early (1925) example of proletarian literature in Japan. He spent a lot of time in jail due to his involvement with the labor movement, but later turned away from Marxism and became an enthusiastic supporter of Japanese imperialism.