How many movies have Koji Watanabe and Takenori Tsukuma collaborated on?

They have worked on 4 movies together! Their first movie together was Digimon Adventure 02: Hurricane Touchdown! The Golden Digimentals (2000) while their highest rated movie together was One Piece: Dead End Adventure (2003). They have not worked together since Welcome to the Space Show (2010). They are most known for their animation films together.