How many movies have Ichirou Ookouchi and Satoshi Hino collaborated on?

They have worked on 6 movies together! Their first movie together was Code Geass: Akito the Exiled 1: The Wyvern Arrives (2012) while their highest rated movie together was Sing a Bit of Harmony (2021). They have not worked together since Sing a Bit of Harmony (2021). They are most known for their animation films together.