How many movies have Takesaku Niisato and Yûya Takayama collaborated on?

They have worked on 2 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 Rape Zombie: Lust of the Dead 5 (2014).