How many movies have Masahiro Sato and Ryotaro Makihara collaborated on?

They have worked on 5 movies together! Their first movie together was Fullmetal Alchemist the Movie: Conqueror of Shamballa (2005) while their highest rated movie together was Summer Days with Coo (2007). They have not worked together since Hal (2013). They are most known for their animation films together.