How many movies have Chihiro Hayashi and Tetsuro Kaku collaborated on?

They have worked on 4 movies together! Their first movie together was Spriggan (1998) while their highest rated movie together was The Girl Who Leapt Through Time (2006). They have not worked together since Crayon Shin-chan: Honeymoon Hurricane ~The Lost Hiroshi~ (2019). They are most known for their animation films together.