How many movies have Katsuji Oyamada and Mami Ogawa collaborated on?

They have worked on 7 movies together! Their first movie together was Itsuki Mariko: Kyonyû shigoku (1989) while their highest rated movie together was Honban: Hajishirazuna kahanshin (1994). They have not worked together since Bullying Housewives: Lewd Heaven (2000).