How many movies have Shigeru Saito and Sumie Murakami collaborated on?

They have worked on 2 movies together! Their first movie together was Hanasaku Iroha: Home Sweet Home (2013) while their highest rated movie together was Maquia: When the Promised Flower Blooms (2018). They have not worked together since Maquia: When the Promised Flower Blooms (2018).