Woman on the Night Train (1972)
Original title: 夜汽車の女
Woman on the Night Train is a 1972 Japanese-language drama movie directed by Noboru Tanaka, with a running time of 1h 11m. It stars Mari Tanaka, Keiko Tsuzuki and Tomoko Katsura.
Saeko is abnormally attached to her older sister, Yumi. When Yumi becomes engaged to Arikawa, Saeko schemes to separate the two. She seduces Arikawa who then becomes confused over his attraction to both sisters.