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

They have worked on 3 movies together! Their first movie together was Spine-Chilling Short Stories Kowabana: Dark Room (2012) and was their highest rated movie together. They have not worked together since Kowabana J: After School Ghost Stories 4 (2013). They are most known for their horror films together.