How many movies have Hiroki Fujiwara and Takumi Yamazaki collaborated on?

They have worked on 4 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 Mother Tree (2015). They have not worked together since Shimajiro in Bookland (2016). They are most known for their family films together.