How many movies have Sō Yamanaka and Takeshi Ōnishi acted in together?

They have worked on 1 movie together! Their first movie together was Crime Mystery by Kosaku Asahina: Tragedy of Hanasaki Village (2016) and was their highest rated movie together. They have not worked together since Crime Mystery by Kosaku Asahina: Tragedy of Hanasaki Village (2016).