How many movies have Toshiharu Sugie and Yuki Iwai collaborated on?

They have worked on 4 movies together! Their first movie together was Hamtaro: Adventures in Ham-Ham Land (2001) and was their highest rated movie together. They have not worked together since Space Battleship Yamato 2199: Odyssey of the Celestial Ark (2014). They are most known for their animation films together.