How many movies have Hiroki Iwasawa and Kazuto Kodama collaborated on?

They have worked on 16 movies together! Their first movie together was Honto ni Atta! Noroi no Video 25 (2007) and was their highest rated movie together. They have not worked together since Honto ni Atta! Noroi No Video: BEST OF BEST (2020). They are most known for their horror films together.