How many movies have Keiichiro Matsui and Megumi Oohara collaborated on?

They have worked on 8 movies together! Their first movie together was Doraemon: Nobita's Secret Gadget Museum (2013) while their highest rated movie together was Doraemon: Nobita's Treasure Island (2018). They have not worked together since Doraemon the Movie: Nobita's Earth Symphony (2024). They are most known for their adventure films together.