Sôseiji (1999)

Yukio is living a charmed life: he is a respected young doctor with a successful practice and a beautiful wife. His only problem is that his wife is suffering from amnesia, and her past is unknown. Things begin to fall apart, however, when both his parents die suddenly, killed by a mysterious stranger with Yukio's face. Only when Yukio confronts this stranger will the mystery of his identity, and his wife's past, be revealed.