How many movies have Ichirō Saitō and Jun'ichirō Narita collaborated on?

They have worked on 7 movies together! Their first movie together was Koina no Ginpei (1961) while their highest rated movie together was Destiny's Son (1962). They have not worked together since Sleepy Eyes of Death 3: Full Circle Killing (1964). They are most known for their action films together.