Kōji Seki

1962

• [ ] Jôyoku no tanima (Director) 
• [ ] Kaima no gyakushû (Director) 

1963

• [ ] Desire in Cavern (Director) 

1964

• [ ] Chijô no ie (Director) 

1965

• [ ] Maizôkin monogatari: Zangyaku no ana (Director) 
• [ ] Tekka geisha (Director) 
• [ ] Hip de shôbu (Director) 

1966

• [ ] Trap of a Love Potion (Director) 
• [ ] Han shojo (Director) 

1967

• [ ] Abnormal Criminal (Director) 
• [ ] Special (Director) 

1968

• [ ] Abnormal Sex Crimes (Director) 

1970

• [ ] 蛇淫の舘 (Director) 

1972

• [ ] Sex Documentary Peek at Japan's Private Parts: Japan's First Infrared Movie (Director) 
• [ ] Hentai kazoku (Director) 

1973

• [ ] Schoolgirl Sukeban Tale (Director) 
• [ ] Kôi ninshin/Chûzetsu (Director) 

1974

• [ ] Apartment Wife: Sex Competition (Director) 

1976

• [ ] Apartment Wife Sex Group (Director) 

1977

• [ ] Chikan tômei ningen (Director) 
• [ ] Chikan tômei ningen me-me-me: Part 2 (Director) 

1979

• [ ] Molester Invisible Man III: Indecency? (Director) 
• [ ] Japanese Erotic Stories: Night Visits (Director) 

1980

• [ ] Perverted Couple (Director) 

1981

• [ ] Groper Train: Just Ride (Director) 
• [ ] Molester Invisible Man PART 4: Deep Inside (Director) 
• [ ] Molester Invisible Man IV: Deepest Depths (Director) 

1982

• [ ] Roses, the Sea and the Sun (Assistant Director) 

1984

• [ ] 3D Movie: The Acme (Director) 

1979

• [ ] Molester Invisible Man III: Indecency? (Screenplay) 

1981

• [ ] Molester Invisible Man IV: Deepest Depths (Screenplay) 

1984

• [ ] Sanjigen tōshi: Sex ultra eye (Screenplay) 

1989

• [ ] Kezorima (Production Assistant)