How many movies have Reiko Sasaki and Seiji Takaiwa collaborated on?

They have worked on 3 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 Kamen Rider OOO Wonderful: The Shogun and the 21 Core Medals (2011). They are most known for their science fiction films together.