How many movies have Masuo Mamada and Teiyu Ichiryusai collaborated on?

They have worked on 4 movies together! Their first movie together was Crayon Shin-chan: Explosion! The Hot Spring's Feel Good Final Battle (1999) while their highest rated movie together was Crayon Shin-chan: The Legend Called Buri Buri 3 Minutes Charge (2005). They have not worked together since Crayon Shin-chan: Honeymoon Hurricane ~The Lost Hiroshi~ (2019). They are most known for their animation films together.