How many movies have Kazuyuki Sakamoto and Natsuko Kitani collaborated on?

They have worked on 6 movies together! Their first movie together was Honto ni Atta! Noroi No Video 9 (2003) and was their highest rated movie together. They have not worked together since Honto ni Atta! Noroi no Video 15 (2005). They are most known for their horror films together.