How many movies have Shouji Yonemura and Toshihiko Seki collaborated on?

They have worked on 8 movies together! Their first movie together was Kamen Rider Decade: All Riders vs. Dai-Shocker (2009) while their highest rated movie together was Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai (2014). They have not worked together since Kamen Rider × Super Sentai: Ultra Super Hero Wars (2017). They are most known for their science fiction films together.