How many movies have Keiji Fujiwara and Yoshito Usui collaborated on?

They have worked on 23 movies together! Their first movie together was Crayon Shin-chan: Action Mask vs. Leotard Devil (1993) while their highest rated movie together was Shin Chan: The Adult Empire Strikes Back (2001). They have not worked together since Crayon Shin-chan: Fast Asleep! Dreaming World Big Assault! (2016). They are most known for their animation films together.