How many movies have Shûichi Isoda and Yôhei Fukuda collaborated on?

They have worked on 5 movies together! Their first movie together was Honto Ni Atta! Noroi No Video 16 (2005) and was their highest rated movie together. They have not worked together since Scary True Stories: Grudge 2 (2007). They are most known for their horror films together.