How many movies have Masahiro Tabuchi and Masatsugu Koyama collaborated on?

They have worked on 1 movie together! Their first movie together was A Married Woman's High-Cut Swimsuit Shame Yuko Shiraki (2014) and was their highest rated movie together. They have not worked together since A Married Woman's High-Cut Swimsuit Shame Yuko Shiraki (2014).