How many movies have Kenichi Sato and Toshihiko Sahashi collaborated on?

They have worked on 2 movies together! Their first movie together was Kamen Rider Den-O The Movie: I’m Born! (2007) while their highest rated movie together was Kamen Rider Den-O & Kiva: Climax Deka (2008). They have not worked together since Kamen Rider Den-O & Kiva: Climax Deka (2008).