YMMV / Reincarnation (2005)

• Complete Monster: Professor Norihasa Omori, the culprit of the Gunma Hotel Murders, is an obsessive psychopath who became a mass murderer solely to prove the existence of reincarnation. Believing humans to be nothing but "temporary vessels" for the consciousness, Omori decided to test his hypothesis by bringing his family to a hotel and filming himself murdering 11 innocent people, including his own children.
• Nightmare Fuel: The murder-suicide scene: this loving father who decides that in order to prove the theory of reincarnation, he must murder his two kids and several people in the hotel he's at.
• One-Scene Wonder: The hotel maid, as played by Takako Fuji, thanks to being one of the more unsettling ghosts in the film.