How many movies have Chihiro Hayashi and Yumi Chiba collaborated on?

They have worked on 4 movies together! Their first movie together was Spriggan (1998) while their highest rated movie together was Crayon Shin-chan: Honeymoon Hurricane ~The Lost Hiroshi~ (2019). They have not worked together since Doraemon the Movie: Nobita's Sky Utopia (2023). They are most known for their animation films together.