How many movies have Hiroyuki Sawano and Kazuhiro Yamada collaborated on?

They have worked on 4 movies together! Their first movie together was Kabaneri of the Iron Fortress Recap 2: Burning Life (2017) while their highest rated movie together was Attack on Titan: The Roar of Awakening (2018). They have not worked together since Bubble (2022). They are most known for their animation films together.