Gemini is a 1999 horror film by Shinya Tsukamoto. It is loosely based on an Edogawa Ranpo story, which pursues Tsukamoto's theme of the brutally physical and animalistic side of human beings rearing its ugly head underneath a civilized veneer, present in previous films like Tetsuo: The Iron Man (1989) and Tokyo Fist (1995), in what was a new territory for Tsukamoto at the time — a story set in the late Meiji era (1868–1912) with no stop-motion photography and no industrial setting.