How many movies have Hisashi Abe and Yoshikazu Iwanami collaborated on?

They have worked on 4 movies together! Their first movie together was Ranma ½ Nightmare! Incense of Spring Sleep (2008) 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 Psycho-Pass: Sinners of the System - Case.3 On the Other Side of Love and Hate (2019). They are most known for their animation films together.