How many movies have Ryoko Murakami and Satomi Korogi collaborated on?

They have worked on 6 movies together! Their first movie together was Crayon Shin-chan: A Storm-invoking Splendor! The Battle of the Warring States (2002) while their highest rated movie together was Crayon Shin-chan: Invoke a Storm! The Kasukabe Boys of the Evening Sun (2004). They have not worked together since Crayon Shin-chan: Invoke a Super Storm! The Hero of Kinpoko (2008). They are most known for their animation films together.