How many movies have Akiyuki Simbo and Atsuhiro Iwakami collaborated on?

They have worked on 7 movies together! Their first movie together was Puella Magi Madoka Magica the Movie Part I: Beginnings (2012) 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.