How many movies have Keijirô Hara and Urara Haru collaborated on?

They have worked on 4 movies together! Their first movie together was Senritsu Kaiki File Kowasugi! File 02: Shivering Ghost (2012) while their highest rated movie together was Senritsu Kaiki File Kowasugi! Final Chapter (2015). They have not worked together since Senritsu Kaiki File Kowasugi! Final Chapter (2015). They are most known for their horror films together.