How many movies have Kasumi Yamaya and Toshihiro Yashiba acted in together?

They have worked on 4 movies together! Their first movie together was Shuriken Sentai Ninninger vs. Kamen Rider Drive: Spring Break Combined Special (2015) while their highest rated movie together was Come Back! Shuriken Sentai Ninninger: Ninnin Girls vs. Boys FINAL WARS (2016). They have not worked together since Doubutsu Sentai Zyuohger vs. Ninninger the Movie: Super Sentai's Message from the Future (2017). They are most known for their adventure films together.