How many movies have Riku Shiina and Shinji Yamaguchi acted in together?

They have worked on 1 movie together! Their first movie together was 厚顔無恥な恥母　紫の下着で… (2007) and was their highest rated movie together. They have not worked together since 厚顔無恥な恥母　紫の下着で… (2007).