How many movies have Kimiyo Saito and Satoru Hirayanagi collaborated on?

They have worked on 4 movies together! Their first movie together was The Garden of Sinners: Overlooking View (2007) while their highest rated movie together was Rascal Does Not Dream of a Dreaming Girl (2019). They have not worked together since Rascal Does Not Dream of a Dreaming Girl (2019). They are most known for their animation films together.