How many movies have Chisato Ōgawara and Mari Yamaguchi collaborated on?

They have worked on 3 movies together! Their first movie together was Groper Train: School Uniform Hunter (2007) while their highest rated movie together was Female Prisoner Ayaka: Bitch-Training Torment (2008). They have not worked together since MAID-DROID (2008). They are most known for their drama films together.