How many movies have Keijirô Hara and Taira Takano collaborated on?

They have worked on 3 movies together! Their first movie together was Rape Zombie: Lust of the Dead 4 (2014) while their highest rated movie together was Rape Zombie: Lust of the Dead 5 (2014). They have not worked together since Kinbaku: Flower (2016). They are most known for their horror films together.