How many movies have Isamu Imakake and Ryuuhou Ookawa collaborated on?

They have worked on 4 movies together! Their first movie together was The Laws of Eternity (2006) while their highest rated movie together was The Mystical Laws (2012). They have not worked together since The Laws of the Universe: The Age of Elohim (2021). They are most known for their animation films together.