How many movies have Kaori Kobayashi and Seiki Tamura 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 Lupin the Third: Goemon's Blood Spray (2017). They have not worked together since Your Voice -KIMIKOE- (2017). They are most known for their animation films together.