How many movies have Koji Yokoyama and Riria Himesaki collaborated on?

They have worked on 1 movie together! Their first movie together was ドリームハンター天海麗 X D.D.ブレイカー姫咲りりあ (2007) and was their highest rated movie together. They have not worked together since ドリームハンター天海麗 X D.D.ブレイカー姫咲りりあ (2007).