How many movies have Eiji Wakamatsu and Sejoon Kim collaborated on?

They have worked on 3 movies together! Their first movie together was Fullmetal Alchemist the Movie: The Sacred Star of Milos (2011) while their highest rated movie together was Sword Art Online: The Movie – Ordinal Scale (2017). They have not worked together since Mobile Suit Gundam Hathaway (2021). They are most known for their science fiction films together.