How many movies have Hironori Tanaka and Koji Iwaki collaborated on?

They have worked on 2 movies together! Their first movie together was Mobile Suit Gundam 00 The Movie: -A Wakening of the Trailblazer- (2010) while their highest rated movie together was Mobile Suit Gundam Narrative (2018). They have not worked together since Mobile Suit Gundam Narrative (2018).