How many movies have Akiyuki Shinbo and Mitsutoshi Kubota collaborated on?

They have worked on 3 movies together! Their first movie together was Puella Magi Madoka Magica the Movie Part III: Rebellion (2013) while their highest rated movie together was Kizumonogatari Part 2: Nekketsu (2016). They have not worked together since Fireworks (2017). They are most known for their fantasy films together.