How many movies have Shinichi Koga and Yoshihisa Shimazaki collaborated on?

They have worked on 1 movie together! Their first movie together was Eko Eko Azarak: The First Episode of Misa Kuroi (2011) and was their highest rated movie together. They have not worked together since Eko Eko Azarak: The First Episode of Misa Kuroi (2011).