How many movies have Jirō Ishikawa and Taira Takano collaborated on?

They have worked on 3 movies together! Their first movie together was Invisible Hentai Man (2013) while their highest rated movie together was Rape Zombie Side-Story: Hardcore of the Dead (2017). They have not worked together since Rape Zombie Side-Story: Hardcore of the Dead (2017). They are most known for their horror films together.