How many movies have Jiro Okamoto and Toshihiko Sahashi collaborated on?

They have worked on 5 movies together! Their first movie together was Kamen Rider Den-O The Movie: I’m Born! (2007) and was their highest rated movie together. They have not worked together since Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai (2014). They are most known for their adventure films together.