How many movies have Hiroshi Fujita and Ryō Kaihara collaborated on?

They have worked on 4 movies together! Their first movie together was Virgin Dreeeeam!!! (2009) while their highest rated movie together was Rape Zombie: Lust of the Dead (2012). They have not worked together since Rape Zombie: Lust of the Dead 3 (2013). They are most known for their comedy films together.