How many movies have Kappei Yamaguchi and Masashi Ebara acted in together?

They have worked on 3 movies together! Their first movie together was Giant Robo: The Day the Earth Stood Still (1992) while their highest rated movie together was One Piece: Chopper's Kingdom on the Island of Strange Animals (2002). They have not worked together since One Piece: Chopper's Kingdom on the Island of Strange Animals (2002). They are most known for their animation films together.