How many movies have Kaori Saito and Nagisa Nakajima collaborated on?

They have worked on 2 movies together! Their first movie together was Code Geass: Akito the Exiled 4: Memories of Hatred (2015) while their highest rated movie together was Love Live! Sunshine!! The School Idol Movie Over the Rainbow (2019). They have not worked together since Love Live! Sunshine!! The School Idol Movie Over the Rainbow (2019).