How many movies have Gorō Naya and Koichi Tsunoda collaborated on?

They have worked on 4 movies together! Their first movie together was 30,000 Miles Under the Sea (1970) while their highest rated movie together was Space Battleship Yamato - Final Chapter (1983). They have not worked together since Odin: Starlight Mutiny (1985). They are most known for their animation films together.