How many movies have Kei Ajiki and Yoshikazu Iwanami collaborated on?

They have worked on 5 movies together! Their first movie together was The Garden of Sinners: A Study in Murder (Part 1) (2007) while their highest rated movie together was The Garden of Sinners: Paradox Spiral (2008). They have not worked together since Psycho-Pass: The Movie (2015). They are most known for their animation films together.