How many movies have Keiichi Hara and Mitsuru Hongo collaborated on?

They have worked on 4 movies together! Their first movie together was Crayon Shin-chan: Action Mask vs. Leotard Devil (1993) while their highest rated movie together was Crayon Shin-chan: Great Adventure In Henderland (1996). They have not worked together since Crayon Shin-chan: Great Adventure In Henderland (1996). They are most known for their animation films together.