How many movies have Hisayo Usui and Izumi Ozawa collaborated on?

They have worked on 8 movies together! Their first movie together was The Garden of Sinners: Paradox Spiral (2008) while their highest rated movie together was Rascal Does Not Dream of a Dreaming Girl (2019). They have not worked together since Detective Conan: The Bride of Halloween (2022). They are most known for their animation films together.