How many movies have Jun Konomaki and Umanosuke Iida collaborated on?

They have worked on 3 movies together! Their first movie together was Devilman - Volume 1: The Birth (1987) while their highest rated movie together was I am Devilman, the Devil! (1991). They have not worked together since I am Devilman, the Devil! (1991). They are most known for their animation films together.