How many movies have Mayu Watanabe and Meru Tashima acted in together?

They have worked on 1 movie together! Their first movie together was Sashihara Rino Graduation Concert 〜Sayonara Sashihara Rino〜 (2019) and was their highest rated movie together. They have not worked together since Sashihara Rino Graduation Concert 〜Sayonara Sashihara Rino〜 (2019).