How many movies have Keiko Fujino and Tsutomu Mizushima collaborated on?

They have worked on 1 movie together! Their first movie together was Crayon Shin-chan: Invoke a Storm! The Kasukabe Boys of the Evening Sun (2004) and was their highest rated movie together. They have not worked together since Crayon Shin-chan: Invoke a Storm! The Kasukabe Boys of the Evening Sun (2004).