How many movies have Nobuteru Yuuki and Satsuki Igarashi collaborated on?

They have worked on 2 movies together! Their first movie together was X: The Movie (1996) while their highest rated movie together was Code Geass: Akito the Exiled 5: To Beloved Ones (2016). They have not worked together since Code Geass: Akito the Exiled 5: To Beloved Ones (2016).