How many movies have Junji Inagawa and Kenichi Tomioka collaborated on?

They have worked on 4 movies together! Their first movie together was Junji Inagawa: Sleepless Ghost Stories: Tales 2 (2009) and was their highest rated movie together. They have not worked together since Junji Inagawa: Sleepless Ghost Stories: All-Stars 1 (2010). They are most known for their horror films together.