How many movies have Shin-ichiro Shirakura and Shuichi Oshima collaborated on?

They have worked on 7 movies together! Their first movie together was Masked Rider Ryuki: EPISODE FINAL (2002) while their highest rated movie together was Kamen Rider 555: Paradise Lost (2003). They have not worked together since Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles (2021). They are most known for their science fiction films together.