How many movies have Rin Niwa and Shin'ya Kôno collaborated on?

They have worked on 1 movie together! Their first movie together was Honto ni Atta: Toko Yami Eizo - 30 Yami Eizo 2 (2016) and was their highest rated movie together. They have not worked together since Honto ni Atta: Toko Yami Eizo - 30 Yami Eizo 2 (2016).