How many movies have Kappei Yamaguchi and Shin'ichirou Fukushima collaborated on?

They have worked on 3 movies together! Their first movie together was One Piece: Baron Omatsuri and the Secret Island (2005) and was their highest rated movie together. They have not worked together since One Piece: The Desert Princess and the Pirates: Adventure in Alabasta (2007). They are most known for their animation films together.