How many movies have Hidenori Fukuoka and Tomoaki Okada collaborated on?

They have worked on 4 movies together! Their first movie together was Fullmetal Alchemist the Movie: The Sacred Star of Milos (2011) while their highest rated movie together was My Hero Academia: Heroes Rising (2019). They have not worked together since My Hero Academia: World Heroes' Mission (2021). They are most known for their fantasy films together.