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

They have worked on 13 movies together! Their first movie together was New Gang Emblem 6 (2015) while their highest rated movie together was Gokudo Apocalypse Chapter 2 (2017). They have not worked together since Gokudō Tenka Fubu: Act 5 (2017).