How many movies have Reina Kawasaki and Wakako Yoshida collaborated on?

They have worked on 4 movies together! Their first movie together was Donten: Laughing Under the Clouds - Gaiden: Chapter 1 - One Year After the Battle (2017) while their highest rated movie together was Gintama: The Very Final (2021). They have not worked together since Kaguya-sama: Love Is War -The First Kiss That Never Ends- (2022). They are most known for their animation films together.