How many movies have Ikuko Tamine and Sin So-yeon collaborated on?

They have worked on 4 movies together! Their first movie together was Tamako Love Story (2014) while their highest rated movie together was Beyond the Boundary: I'll Be Here – Future (2015). They have not worked together since Sound! Euphonium the Movie – Welcome to the Kitauji High School Concert Band (2016). They are most known for their animation films together.