How many movies have Fujiko F. Fujio and Tomokazu Seki collaborated on?

They have worked on 20 movies together! Their first movie together was Doraemon: Nobita in the Wan-Nyan Spacetime Odyssey (2004) while their highest rated movie together was Doraemon: Nobita's Chronicle of the Moon Exploration (2019). They have not worked together since Doraemon the Movie: Nobita's Earth Symphony (2024). They are most known for their adventure films together.