How many movies have Shizuka Hayashi and Takashi Wakamatsu collaborated on?

They have worked on 4 movies together! Their first movie together was Crayon Shin-chan: Unkokusai's Ambition (1995) 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: The Legend Called Buri Buri 3 Minutes Charge (2005). They are most known for their animation films together.