How many movies have Ken Ootsuka and Yasuhiro Irie collaborated on?

They have worked on 3 movies together! Their first movie together was Mobile Suit Gundam: The 08th MS Team - Miller's Report (1998) while their highest rated movie together was Fullmetal Alchemist the Movie: Conqueror of Shamballa (2005). They have not worked together since Fullmetal Alchemist the Movie: Conqueror of Shamballa (2005). They are most known for their animation films together.