How many movies have Hiroto Kato and Kenji Sakai 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 Accel World: Infinite Burst (2016). They have not worked together since Accel World: Infinite Burst (2016).