How many movies have Hitomi Saito and Miki Korenaga acted in together?

They have worked on 13 movies together! Their first movie together was Hello! Project 2007 Winter ~Shuuketsu! 10th Anniversary~ (2007) while their highest rated movie together was Hello! Project 2008 Winter ~Kashimashi Elder Club~ (2008). They have not worked together since Hello! Project 2009 Winter Kettei! Hello☆Pro Award '09 ~Backstage Video~ (2009).