How many movies have Kōsuke Komatsu and Makoto Sasaki collaborated on?

They have worked on 1 movie together! Their first movie together was Hatsujō monogatari: Osananajimi wa Yari-mori (2019) and was their highest rated movie together. They have not worked together since Hatsujō monogatari: Osananajimi wa Yari-mori (2019).