How many movies have Hidetsugu Hirayama and Kotono Mitsuishi collaborated on?

They have worked on 2 movies together! Their first movie together was Sailor Moon S the Movie: Hearts in Ice (1994) while their highest rated movie together was Sailor Moon SuperS: The Movie: Black Dream Hole (1995). They have not worked together since Sailor Moon SuperS: The Movie: Black Dream Hole (1995).