How many movies have Mamiko Nakanishi and Naoki Yamauchi collaborated on?

They have worked on 4 movies together! Their first movie together was Bleach the Movie: Fade to Black (2008) while their highest rated movie together was SHIROBAKO the Movie (2020). They have not worked together since Mobile Suit Gundam SEED FREEDOM (2024). They are most known for their animation films together.