How many movies have Rumiko Takahashi and Yoko Matsushita collaborated on?

They have worked on 6 movies together! Their first movie together was Urusei Yatsura: The Final Chapter (1988) while their highest rated movie together was Ranma ½: The Movie 2 — The Battle of Togenkyo: Rescue the Brides! (1992). They have not worked together since Ranma ½: The Movie 2 — The Battle of Togenkyo: Rescue the Brides! (1992). They are most known for their animation films together.