How many movies have Saeko Shimazu and Yoko Matsushita collaborated on?

They have worked on 3 movies together! Their first movie together was Urusei Yatsura: The Final Chapter (1988) 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 romance films together.