Keiko Tsushima was a Japanese actress, whose real name was Naoko Mori. She was notable for her prominent role in Akira Kurosawa's 1954 film Seven Samurai. She also starred in Japanese television series such as Sakura and Kimi ga Jinsei no Toki.
Born in Nagasaki Prefecture, she married Ichio Mori, then director of Tokyo Broadcasting System, in 1957. She died of stomach cancer on 1 August 2012 at a hospital in Chuo, Tokyo, aged 86.