How many movies have Akihiko Okase and Hideo Hirata collaborated on?

They have worked on 2 movies together! Their first movie together was Space Battleship Yamato (2010) while their highest rated movie together was Rurouni Kenshin Part III: The Legend Ends (2014). They have not worked together since Rurouni Kenshin Part III: The Legend Ends (2014).