How many movies have Keishi Otomo and So Hashimoto collaborated on?

They have worked on 7 movies together! Their first movie together was Rurouni Kenshin Part I: Origins (2012) while their highest rated movie together was Rurouni Kenshin Part III: The Legend Ends (2014). They have not worked together since THE LEGEND & BUTTERFLY (2023). They are most known for their adventure films together.