How many movies have Jin Tanaka and Mitsuo Iwata collaborated on?

They have worked on 2 movies together! Their first movie together was One Piece "3D2Y": Overcome Ace's Death! Luffy's Vow to his Friends (2014) and was their highest rated movie together. They have not worked together since Doubutsu Sentai Zyuohger Returns: Life Theft! Champion of Earth Tournament (2017).