How many movies have Chafurin and Keaton Yamada acted in together?

They have worked on 4 movies together! Their first movie together was Chibi Maruko-chan (1990) while their highest rated movie together was Chibi Maruko-chan: My Favorite Song (1992). They have not worked together since Chibi Maruko-chan: The Boy from Italy (2015). They are most known for their animation films together.