How many movies have Keiko Toda and Naoko Saito collaborated on?

They have worked on 2 movies together! Their first movie together was Hal's Flute (2012) while their highest rated movie together was Go! Anpanman: Fly! The Handkerchief of Hope (2013). They have not worked together since Go! Anpanman: Fly! The Handkerchief of Hope (2013).