How many movies have Hitoshi Ozawa and Takaaki Ezura collaborated on?

They have worked on 9 movies together! Their first movie together was History of Yakuza Conflict: Huge Organizational Split (2015) while their highest rated movie together was Gokudo Apocalypse Chapter 2 (2017). They have not worked together since Gokudo Apocalypse Chapter 3 (2018).