How many movies have Kazuya Saito and Ryoutarou Akao collaborated on?

They have worked on 4 movies together! Their first movie together was Detective Conan: The Last Wizard of the Century (1999) while their highest rated movie together was New Initial D the Movie - Legend 2: Racer (2015). They have not worked together since New Initial D the Movie - Legend 3: Dream (2016). They are most known for their animation films together.