How many movies have Keisuke Iwata and Masaaki Tsukada collaborated on?

They have worked on 2 movies together! Their first movie together was Bleach the Movie: Memories of Nobody (2006) while their highest rated movie together was A Certain Magical Index: The Miracle of Endymion (2013). They have not worked together since A Certain Magical Index: The Miracle of Endymion (2013).