How many movies have Hochu Otsuka and Houko Kuwashima acted in together?

They have worked on 13 movies together! Their first movie together was 宇宙戦艦ヤマト2199 第一章「遥かなる旅立ち」 劇場先行上映 (2012) while their highest rated movie together was Space Battleship Yamato 2199: A Voyage to Remember (2014). They are most known for their science fiction films together.