How many movies have Goro Taniguchi and Ichirou Ookouchi collaborated on?

They have worked on 10 movies together! Their first movie together was Code Geass: Lelouch of the Rebellion Special Edition Black Rebellion (2008) while their highest rated movie together was Code Geass: Lelouch of the Re;Surrection (2019). They have not worked together since Code Geass: Lelouch of the Re;Surrection (2019). They are most known for their animation films together.