How many movies have Chika Ishii and Ryota Furukawa collaborated on?

They have worked on 4 movies together! Their first movie together was Psycho-Pass: Sinners of the System - Case.1 Crime and Punishment (2019) while their highest rated movie together was Psycho-Pass: Sinners of the System - Case.3 On the Other Side of Love and Hate (2019). They have not worked together since Fate/Grand Order the Movie: Divine Realm Of The Round Table: Camelot Paladin; Agateram (2021). They are most known for their animation films together.