How many movies have Mari Mashiba and Yoshito Usui collaborated on?

They have worked on 22 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: Storm-invoking Passion! The Adult Empire Strikes Back (2001). They have not worked together since Crayon Shin-chan: Mononoke Ninja Chinpūden (2022). They are most known for their animation films together.