How many movies have Futoshi Jinno and Youko Inui collaborated on?

They have worked on 3 movies together! Their first movie together was Crazed Head Outside of 23 Wards: Unforgiven (2003) while their highest rated movie together was Crazed Head Outside of 23 Wards: Never Ending (2003). They have not worked together since Crazed Head Outside of 23 Wards: Omnibus Version (2005). They are most known for their horror films together.