How many movies have Eiko Saito and Takashi Murai 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 One Piece Film: Z (2012). They have not worked together since Space Battleship Yamato 2199: Odyssey of the Celestial Ark (2014). They are most known for their animation films together.