How many movies have Sukekiyo Kameyama and Toshio Tanaka collaborated on?

They have worked on 2 movies together! Their first movie together was Devilman - Volume 1: The Birth (1987) while their highest rated movie together was Devilman - Volume 2: Demon Bird (1990). They have not worked together since Devilman - Volume 2: Demon Bird (1990).