How many movies have Hideichi Nagahara and Keisuke Yukioka collaborated on?

They have worked on 5 movies together! Their first movie together was A Colt Is My Passport (1967) while their highest rated movie together was Sex Rider: Injured Lust (1973). They have not worked together since Sex Rider: Injured Lust (1973). They are most known for their crime films together.