How many movies have Issei Futamata and Torao Arai collaborated on?

They have worked on 5 movies together! Their first movie together was Urusei Yatsura: Ryoko's September Tea Party (1985) while their highest rated movie together was Urusei Yatsura: The Final Chapter (1988). They have not worked together since Gdleen (1990). They are most known for their animation films together.