How many movies have Akihiko Okase and Mizuki Ito collaborated on?

They have worked on 5 movies together! Their first movie together was Battle Royale (2000) while their highest rated movie together was Howl's Moving Castle (2004). They have not worked together since We Can't Change the World, But We Wanna Build a School in Cambodia (2011). They are most known for their drama films together.