How many movies have Haruna Gohzu and Yoko Hikasa collaborated on?

They have worked on 4 movies together! Their first movie together was A Certain Magical Index: The Miracle of Endymion (2013) and was their highest rated movie together. They have not worked together since Code Geass: Akito the Exiled 5: To Beloved Ones (2016). They are most known for their animation films together.