Boko climax!(1987)

Director Hisayasu Sato helmed this peculiar tale about a woman known as Locker Baby because she was left in a bus station locker as an infant. Locker Baby is raped by a man clad in black leather, traumatizing her still further, and driving her to sensory-deprivation therapy. Unfortunately, she is raped during the course of the therapy and becomes pregnant.