How many movies have Nguyen Thi Nguyet Hieu and Osamu Tayama collaborated on?

They have worked on 4 movies together! Their first movie together was Case Closed: The Crimson Love Letter (2017) while their highest rated movie together was Her Blue Sky (2019). They have not worked together since Detective Conan: The Scarlet Bullet (2021). They are most known for their animation films together.