How many movies have Gorō Naya and Kazuhiko Kato collaborated on?

They have worked on 31 movies together! Their first movie together was Lupin the Third: The Mystery of Mamo (1978) while their highest rated movie together was Lupin the Third: The Castle of Cagliostro (1979). They have not worked together since Lupin the Third: The Last Job (2010). They are most known for their animation films together.