Ryutaro Oka

1983

• [ ] Girl Mantle Bud Torture (????) 

1984

• [ ] Love Beast: Steamy Disgrace (????) 

1985

• [ ] Bondage: The Intoxication of Rope (Detective B) 

1991

• [ ] Kyûkyoku onanii: Okumade marumie (Shotaro Tanaka)