How many movies have Mitsuo Murayama and Seitaro Omori collaborated on?

They have worked on 5 movies together! Their first movie together was Zoku teppō inu (1966) while their highest rated movie together was Karafuto 1945 Summer (1974). They have not worked together since Karafuto 1945 Summer (1974). They are most known for their war films together.