How many movies have Rikiya Koyama and Yosuke Yabumoto collaborated on?

They have worked on 2 movies together! Their first movie together was Naruto Shippuden the Movie: The Lost Tower (2010) while their highest rated movie together was Bodacious Space Pirates: Abyss of Hyperspace (2014). They have not worked together since Bodacious Space Pirates: Abyss of Hyperspace (2014).