How many movies have Machiko Washio and Shigeharu Shiba collaborated on?

They have worked on 4 movies together! Their first movie together was Urusei Yatsura: Ryoko's September Tea Party (1985) while their highest rated movie together was Castle in the Sky (1986). They have not worked together since Urusei Yatsura: The Final Chapter (1988). They are most known for their family films together.