How many movies have Hitomi Saito and Toshiaki Hatakeyama acted in together?

They have worked on 4 movies together! Their first movie together was Uta Doki! Pop Classics Vol.1 (2007) while their highest rated movie together was Uta Doki! Pop Classics Vol.6 (2007). They have not worked together since Hello! Project 2013 COUNTDOWN PARTY 2013-2014 ~GOODBYE & HELLO!~ (2013).