How many movies have Keiji Kameyama and Toru Ishii collaborated on?

They have worked on 4 movies together! Their first movie together was Kamen Rider Den-O & Kiva: Climax Deka (2008) and was their highest rated movie together. They have not worked together since Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship (2009). They are most known for their science fiction films together.