How many movies have Iona and Naoyuki Tomomatsu collaborated on?

They have worked on 6 movies together! Their first movie together was Rape Zombie: Lust of the Dead 2 (2013) while their highest rated movie together was Rape Zombie: Lust of the Dead 5 (2014). They have not worked together since Amazing Place (2017). They are most known for their horror films together.