How many movies have Kazuhiro Oki and Yoshitaka Kohno collaborated on?

They have worked on 4 movies together! Their first movie together was Tenchi Forever! (1999) while their highest rated movie together was Bleach the Movie: Memories of Nobody (2006). 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.