How many movies have Kappei Yamaguchi and Osamu Nakatani collaborated on?

They have worked on 8 movies together! Their first movie together was Lupin the Third vs. Detective Conan: The Movie (2013) while their highest rated movie together was Detective Conan: Episode One - The Great Detective Turned Small (2017). They have not worked together since Detective Conan: Black Iron Submarine (2023). They are most known for their animation films together.