How many movies have Rikiya Koyama and Toshikazu Kamiaka collaborated on?

They have worked on 2 movies together! Their first movie together was Kamen Rider Zi-O the Movie: Over Quartzer (2019) and was their highest rated movie together. They have not worked together since Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles (2021).