How many movies have Akihiko Okase and Kazuhiro Sawataishi collaborated on?

They have worked on 5 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 Antiporno (2017). They are most known for their action films together.