How many movies have Mpi and Yasuko Kobayashi collaborated on?

They have worked on 3 movies together! Their first movie together was Attack on Titan: Crimson Bow and Arrow (2014) while their highest rated movie together was Attack on Titan: The Roar of Awakening (2018). They have not worked together since Attack on Titan: The Roar of Awakening (2018). They are most known for their fantasy films together.