How many movies have Eriko Nakamura and Minami Usui collaborated on?

They have worked on 6 movies together! Their first movie together was The Garden of Sinners: Oblivion Recording (2008) while their highest rated movie together was Natsume's Book of Friends: Ephemeral Bond (2018). They have not worked together since Detective Conan: The Scarlet Bullet (2021). They are most known for their animation films together.