How many movies have Daisuke Sakaguchi and Kappei Yamaguchi acted in together?

They have worked on 6 movies together! Their first movie together was A Tree of Palme (2002) while their highest rated movie together was One Piece: Baron Omatsuri and the Secret Island (2005). They have not worked together since One Piece Episode of Sabo: The Three Brothers' Bond - The Miraculous Reunion and the Inherited Will (2015). They are most known for their animation films together.