How many movies have Hideaki Matsuoka and Hiroshi Oikawa collaborated on?

They have worked on 4 movies together! Their first movie together was Chocolate Underground the Movie (2009) while their highest rated movie together was Yu-Gi-Oh!: The Dark Side of Dimensions (2016). They have not worked together since Yu-Gi-Oh!: The Dark Side of Dimensions (2016). They are most known for their animation films together.