How many movies have Kotomi Yagi and Shunichiro Yoshihara collaborated on?

They have worked on 2 movies together! Their first movie together was Sakura Wars: The Movie (2001) while their highest rated movie together was Interstella 5555: The 5tory of the 5ecret 5tar 5ystem (2003). They have not worked together since Interstella 5555: The 5tory of the 5ecret 5tar 5ystem (2003).