How many movies have Rina Akiyama and Toshihiko Sahashi collaborated on?

They have worked on 10 movies together! Their first movie together was Kamen Rider Agito: Project G4 (2001) while their highest rated movie together was Kamen Rider Den-O & Kiva: Climax Deka (2008). They have not worked together since Super Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End Pirates (2010). They are most known for their science fiction films together.