How many movies have Masafumi Oishi and Tsuyoshi Imai collaborated on?

They have worked on 2 movies together! Their first movie together was Gantz: Perfect Answer (2011) 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).