How many movies have Seishi Yokomizo and Tomisaburō Wakayama collaborated on?

They have worked on 6 movies together! Their first movie together was Ningyō Sashichi torimonochō: Koshimoto Irezumi Shibijin (1958) while their highest rated movie together was Lullaby to Kill (1977). They have not worked together since Lullaby to Kill (1977). They are most known for their drama films together.