How many movies have Akihiko Okamoto and Ritsuko Tanaka collaborated on?

They have worked on 2 movies together! Their first movie together was NMB48 Geinin! The Movie Owarai Seishun Girls! (2013) while their highest rated movie together was NMB48 Geinin! The Movie Returns Sotsugyo! Owarai Seishun Girls! (2014). They have not worked together since NMB48 Geinin! The Movie Returns Sotsugyo! Owarai Seishun Girls! (2014).