How many movies have Osamu Iwamura and Shoei Miyata collaborated on?

They have worked on 16 movies together! Their first movie together was Honto ni Atta! Noroi No Video Vol.57 (2014) while their highest rated movie together was Honto Ni Atta! Noroi No Video 63 (2015). They have not worked together since Honto Ni Atta! Noroi No Video 81 (2019). They are most known for their horror films together.