How many movies have Jirō Hachimitsu and Shimako Iwai collaborated on?

They have worked on 1 movie together! Their first movie together was Junji Inagawa: Sleepless Ghost Stories: Tales 1 (2009) and was their highest rated movie together. They have not worked together since Junji Inagawa: Sleepless Ghost Stories: Tales 1 (2009).