How many movies have Kappei Yamaguchi and Kumiko Nishihara acted in together?

They have worked on 3 movies together! Their first movie together was Bronze: Zetsuai Since 1989 (1996) while their highest rated movie together was One Piece: Stampede (2019). They have not worked together since One Piece: Stampede (2019). They are most known for their animation films together.