How many movies have Kohsuke Toriumi and Osamu Yamasaki collaborated on?

They have worked on 2 movies together! Their first movie together was Hakuouki: Wild Dance of Kyoto (2013) while their highest rated movie together was Hakuouki: Warrior Spirit of the Blue Sky (2014). They have not worked together since Hakuouki: Warrior Spirit of the Blue Sky (2014).