How many movies have Hitomi Aso and Masami Otsuka collaborated on?

They have worked on 4 movies together! Their first movie together was Doraemon: Nobita's Great Adventure in the Antarctic Kachi Kochi (2017) while their highest rated movie together was Doraemon: Nobita's Chronicle of the Moon Exploration (2019). They have not worked together since Crayon Shin-chan: Honeymoon Hurricane ~The Lost Hiroshi~ (2019). They are most known for their adventure films together.