How many movies have Chiwa Saito and Takashi Kawabata collaborated on?

They have worked on 2 movies together! Their first movie together was Puella Magi Madoka Magica the Movie Part I: Beginnings (2012) while their highest rated movie together was Puella Magi Madoka Magica the Movie Part III: Rebellion (2013). They have not worked together since Puella Magi Madoka Magica the Movie Part III: Rebellion (2013).