How many movies have Kokoro Maeda and Nanami Kubota acted in together?

They have worked on 31 movies together! Their first movie together was Hello! Project 2018 Kenshuusei Happyoukai 6gatsu ~Niji~ (2018) while their highest rated movie together was Hello! Project 2019 Winter ~YOU & I~ Hello! Project 20th Anniversary!! (2019). They have not worked together since Hello! Project 2023 Winter ~TWO OF US~ (2023).