How many movies have Kazuki Yao and Masahiro Goto collaborated on?

They have worked on 6 movies together! Their first movie together was One Piece: The Desert Princess and the Pirates: Adventure in Alabasta (2007) 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.