Gemini

Sôseiji is a movie starring Masahiro Motoki, Ryô, and Yasutaka Tsutsui. A successful doctor, Yukio's picture perfect life is gradually wrecked, and taken over by his avenging twin brother, who bumps off his family members one by one...
When his mother's untimely death quickly follows his father's, a doctor begins to believe a killer may be targeting him and his amnesiac wife.