How many movies have Satoru Hirayanagi and Yoshikazu Iwanami collaborated on?

They have worked on 11 movies together! Their first movie together was The Garden of Sinners: Overlooking View (2007) while their highest rated movie together was Girls und Panzer das Finale: Part IV (2023). They have not worked together since Girls und Panzer das Finale: Part IV (2023). They are most known for their animation films together.