How many movies have Kappei Yamaguchi and Masaya Onosaka acted in together?

They have worked on 4 movies together! Their first movie together was One Piece Episode of Nami: Tears of a Navigator and the Bonds of Friends (2012) while their highest rated movie together was One Piece Episode of East Blue (2017). They have not worked together since One Piece Episode of East Blue (2017). They are most known for their action films together.