How many movies have Takumi Doyama and Tomokazu Seki collaborated on?

They have worked on 2 movies together! Their first movie together was Doraemon the Movie: Nobita's Sky Utopia (2023) while their highest rated movie together was Doraemon the Movie: Nobita's Earth Symphony (2024). They have not worked together since Doraemon the Movie: Nobita's Earth Symphony (2024).