How many movies have Kei Horie and Nagisa Oshima collaborated on?

They have worked on 1 movie together! Their first movie together was Danganronpa The Stage ~Kibō no Gakuen to Zetsubō no Kōkōsei~ (2015) and was their highest rated movie together. They have not worked together since Danganronpa The Stage ~Kibō no Gakuen to Zetsubō no Kōkōsei~ (2015).