How many movies have Hiroshi Kawamata and Takumi Yamazaki collaborated on?

They have worked on 4 movies together! Their first movie together was Shimajiro and the Song of the Whale (2014) while their highest rated movie together was Shimajiro and the Mother Tree (2015). They have not worked together since Shimajirou the Movie: Great Adventure on Magic Island (2018). They are most known for their family films together.