How many movies have Kengo Kawanishi and Natsuki Hanae acted in together?

They have worked on 6 movies together! Their first movie together was Code Geass: Akito the Exiled 4: Memories of Hatred (2015) while their highest rated movie together was Demon Slayer: Kimetsu no Yaiba -To the Swordsmith Village- (2023). They have not worked together since Demon Slayer: Kimetsu no Yaiba ON STAGE Swordsmith Village Arc (2024). They are most known for their animation films together.