How many movies have Takeshi Sone and Yokoyama Kazuhiro collaborated on?

They have worked on 4 movies together! Their first movie together was Spine-Chilling Short Stories Kowabana: Scary Stories from the Studio (2012) and was their highest rated movie together. They have not worked together since Spine-Chilling Short Stories Kowabana: Scary Woman (2013). They are most known for their horror films together.