How many movies have Hirohisa Sasaki and Hirokatsu Kihara collaborated on?

They have worked on 6 movies together! Their first movie together was Kaidan Shin Mimibukuro: Dai Ichi Ya (2003) while their highest rated movie together was Kaidan Shin Mimibukuro: Dai Go Ya (2006). They have not worked together since Kôshoku danjo: Sex no kisetsu (2019). They are most known for their horror films together.