Naked Rashomon

In Naked Rashomon (Showa Onnamichi: Rashomon), a prostitute gives birth to twins - the result of an affair with a powerful marquis named Katsuragawa. Because twins are considered a bad omen, it is decided that they should be separated at birth. Katsuragawa raises the boy as his successor, while the prostitute raises the girl as a prostitute. 19 years later a chance encounter between the oblivious siblings leads to a bloody trail of vengeance.