How many movies have Mikiho Niwa and Yusuke Yamada acted in together?

They have worked on 1 movie together! Their first movie together was ブラック・エンジェルズ3 黒き死闘篇 (2012) and was their highest rated movie together. They have not worked together since ブラック・エンジェルズ3 黒き死闘篇 (2012).