How many movies have Kenji Yokoyama and Masayuki Takagi collaborated on?

They have worked on 3 movies together! Their first movie together was One Piece: Giant Mecha Soldier of Karakuri Castle (2006) while their highest rated movie together was One Piece: Strong World (2009). They have not worked together since One Piece: Strong World (2009). They are most known for their adventure films together.