How many movies have Eri Yamanashi and Toshiharu Mizutani collaborated on?

They have worked on 5 movies together! Their first movie together was The Piano Forest (2007) while their highest rated movie together was Shimajiro and the Rainbow Oasis (2017). They have not worked together since Shimajiro to Ururu no Heroland (2019). They are most known for their animation films together.