How many movies have Eimei Yamamoto and Isao Matsumoto collaborated on?

They have worked on 37 movies together! Their first movie together was Brutal Tales of Chivalry (1965) while their highest rated movie together was Brutal Tales of Chivalry 5: Man With The Karajishi Tattoo (1969). They have not worked together since Scoundrel Boss (1975). They are most known for their crime films together.