How many movies have Hiroaki Oka and Takaya Yamaguchi acted in together?

They have worked on 6 movies together! Their first movie together was Kamen Rider Saber: 7 Great Riders Transformation! Finisher! Special Supplement Issue! (2020) while their highest rated movie together was Kamen Rider: Beyond Generations (2021). They have not worked together since Kamen Rider Saber: Trio of Deep Sin (2022).