How many movies have Jouji Ooshima and Takeshi Aono collaborated on?

They have worked on 2 movies together! Their first movie together was Coo of The Far Seas (1993) while their highest rated movie together was One Piece: Giant Mecha Soldier of Karakuri Castle (2006). They have not worked together since One Piece: Giant Mecha Soldier of Karakuri Castle (2006).