How many movies have Kazuma Miki and Shigeru Nishiyama collaborated on?

They have worked on 2 movies together! Their first movie together was A Certain Magical Index: The Miracle of Endymion (2013) while their highest rated movie together was Sword Art Online: The Movie – Ordinal Scale (2017). They have not worked together since Sword Art Online: The Movie – Ordinal Scale (2017).