How many movies have Ippei Ichii and Shizuka Hayashi collaborated on?

They have worked on 4 movies together! Their first movie together was Crayon Shin-chan: Super-Dimension! The Storm Called My Bride (2010) and was their highest rated movie together. They have not worked together since Crayon Shin-chan: Shrouded in Mystery! The Flowers of Tenkazu Academy (2021). They are most known for their animation films together.