How many movies have Makoto Itō and Seiji Takaiwa collaborated on?

They have worked on 9 movies together! Their first movie together was Kamen Rider 555: Paradise Lost (2003) 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 adventure films together.