How many movies have Kei Wakakusa and Minoru Maruo collaborated on?

They have worked on 3 movies together! Their first movie together was Crayon Shin-chan: Invoke a Storm! The Singing Buttocks Bomb (2007) while their highest rated movie together was Crayon Shin-chan: Roar! Kasukabe Animal Kingdom (2009). They have not worked together since Crayon Shin-chan: Roar! Kasukabe Animal Kingdom (2009). They are most known for their comedy films together.