How many movies have Kei Hyoudou and Sadatoshi Matsuzaka collaborated on?

They have worked on 8 movies together! Their first movie together was Case Closed: The Fourteenth Target (1998) while their highest rated movie together was Yo-kai Watch Shadowside: Resurrection of the Demon King (2017). They have not worked together since Yo-kai Watch Jam: Yo-kai Academy Y - Can a Cat Be a Hero? (2019). They are most known for their animation films together.