How many movies have Hiroshi Takahashi and Keiji Kameyama collaborated on?

They have worked on 4 movies together! Their first movie together was Kamen Rider Kabuto: God Speed Love (2006) while their highest rated movie together was Kamen Rider Den-O The Movie: I’m Born! (2007). They have not worked together since Kamen Rider Decade: All Riders vs. Dai-Shocker (2009). They are most known for their adventure films together.