How many movies have Satoshi Iwata and Takashi Ukaji collaborated on?

They have worked on 1 movie together! Their first movie together was Kyotaro Nishimura Travel Mystery 68: Disappearing Woman in Yamagata (2017) and was their highest rated movie together. They have not worked together since Kyotaro Nishimura Travel Mystery 68: Disappearing Woman in Yamagata (2017).