How many movies have Eiichiro Oda and Hiroaki Hirata collaborated on?

They have worked on 19 movies together! Their first movie together was Luffy's Fall! The Unexplored Region - Grand Adventure in the Ocean's Navel (2000) while their highest rated movie together was One Piece: Stampede (2019). They have not worked together since One Piece Film Red (2022). They are most known for their animation films together.