How many movies have Shoichi Shirato and Yumi Yoshiyuki acted in together?

They have worked on 5 movies together! Their first movie together was Groper Train: Burusera Squad Exposed (1994) while their highest rated movie together was Erotic Ghost Story: Female Ghost in Heat (1995). They have not worked together since Entrails of a Ripe Woman: Scarlet Crevice (1997).