How many movies have Eiko Yamada and Shigeru Yanagawa collaborated on?

They have worked on 3 movies together! Their first movie together was What's Michael? (1985) while their highest rated movie together was Ranma ½: The Movie — The Battle of Nekonron: The Fight to Break the Rules! (1991). They have not worked together since Ranma ½: The Movie — The Battle of Nekonron: The Fight to Break the Rules! (1991). They are most known for their comedy films together.