How many movies have Kaizo Hayashi and Sachiko Itô collaborated on?

They have worked on 4 movies together! Their first movie together was Circus Boys (1989) while their highest rated movie together was Hakuchi: The Innocent (1999). They have not worked together since Golden Flower: What Is Hidden Is the True Flower, What Is Gone Is the Butterfly (2009). They are most known for their drama films together.