How many movies have Ai Fukada and Isamu Hirabayashi collaborated on?

They have worked on 2 movies together! Their first movie together was Shimajiro and Fufu's Great Adventure: Save the Seven-Colored Flower! (2013) while their highest rated movie together was Shimajiro and the Song of the Whale (2014). They have not worked together since Shimajiro and the Song of the Whale (2014).