How many movies have Leiji Matsumoto and Makoto Kobayashi collaborated on?

They have worked on 2 movies together! Their first movie together was Space Battleship Yamato 2199: Odyssey of the Celestial Ark (2014) and was their highest rated movie together. They have not worked together since Space Battleship Yamato 2202: Warriors of Love - Ch. 3 (2017).