How many movies have Ichirō Hoshijima and Tatsuo Umemiya collaborated on?

They have worked on 18 movies together! Their first movie together was The Boy Detectives Club – The Enemy Is an Atomic Submarine (1959) while their highest rated movie together was Brutal Tales of Chivalry (1965). They have not worked together since Rogue Of The Night (1972). They are most known for their drama films together.