How many movies have Yoshiyuki Okazaki and Yuko Sakurai collaborated on?

They have worked on 3 movies together! Their first movie together was Psychic Documentary: Hair-Raising - Spirit Soul Boundary Phenomenon!! (2009) and was their highest rated movie together. They have not worked together since Psychic Documentary: Forbidden Spectral Manifestation - Do Not Watch!! (2009). They are most known for their horror films together.