How many movies have Ryotaro Okiayu and Toyomi Sugiyama collaborated on?

They have worked on 1 movie together! Their first movie together was Gensomaden Saiyuki Requiem: For the One Not Chosen (2001) and was their highest rated movie together. They have not worked together since Gensomaden Saiyuki Requiem: For the One Not Chosen (2001).