How many movies have Keiji Ishihara and Takashi Hashimoto collaborated on?

They have worked on 4 movies together! Their first movie together was Steamboy (2004) while their highest rated movie together was Puella Magi Madoka Magica the Movie Part III: Rebellion (2013). 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.