How many movies have Kappei Yamaguchi and Mitsuo Iwata acted in together?

They have worked on 3 movies together! Their first movie together was Dead Leaves (2004) while their highest rated movie together was One Piece "3D2Y": Overcome Ace's Death! Luffy's Vow to his Friends (2014). They have not worked together since One Piece "3D2Y": Overcome Ace's Death! Luffy's Vow to his Friends (2014). They are most known for their animation films together.