How many movies have Hiroshi Koujina and Kazuki Yao collaborated on?

They have worked on 3 movies together! Their first movie together was City Hunter: .357 Magnum (1989) while their highest rated movie together was Devilman - Volume 3: Devilman Apocalypse (2000). They have not worked together since Initial D: Third Stage (2001). They are most known for their animation films together.