How many movies have Takashi Kawabata and Yoshiaki Tsubata collaborated on?

They have worked on 2 movies together! Their first movie together was Puella Magi Madoka Magica the Movie Part III: Rebellion (2013) while their highest rated movie together was Donten: Laughing Under the Clouds - Gaiden: Chapter 3 - Conspiracy of the Military (2018). They have not worked together since Donten: Laughing Under the Clouds - Gaiden: Chapter 3 - Conspiracy of the Military (2018).