How many movies have Kōyū Ohara and Yoshiyuki Kaino collaborated on?

They have worked on 7 movies together! Their first movie together was True Story of a Woman in Jail: Sex Hell (1975) while their highest rated movie together was Koichiro Uno's Female Gymnastic Teacher (1979). They have not worked together since Gold Finger: Mô ichido okumade (1983). They are most known for their drama films together.