How many movies have Keiichi Hara and Osamu Ichikawa collaborated on?

They have worked on 2 movies together! Their first movie together was Mami the Psychic: Dancing Dolls in a Starry Sky (1988) while their highest rated movie together was Crayon Shin-chan: Unkokusai's Ambition (1995). They have not worked together since Crayon Shin-chan: Unkokusai's Ambition (1995).