How many movies have Kei Sawada and Naomi Kawai collaborated on?

They have worked on 3 movies together! Their first movie together was Mysterious! Unbelievable: Impact! Journey through the Terrifying Spiritual Hell (2012) and was their highest rated movie together. They have not worked together since Honto ni Atta! Noroi no Video Vol. 53 (2013). They are most known for their horror films together.