How many movies have Mami Koyama and Tomoaki Tsurubuchi collaborated on?

They have worked on 4 movies together! Their first movie together was Mobile Suit Gundam I (1981) while their highest rated movie together was City Hunter Special: The Secret Service (1996). They have not worked together since City Hunter Special: The Death of Vicious Criminal Saeba Ryo (1999). They are most known for their action films together.