How many movies have Kenji Komatsu and Takeshi Katayama collaborated on?

They have worked on 10 movies together! Their first movie together was Takumi-kun Series: And the Spring Breeze Whispers (2007) while their highest rated movie together was Seven Days: Monday - Thursday (2015). They have not worked together since Not in Textbooks 5 (2019). They are most known for their romance films together.