How many movies have Hiroyuki Okiura and Itta Kobayashi collaborated on?

They have worked on 1 movie together! Their first movie together was Blue Comet SPT Layzner: Act-III Seal 2000 (1986) and was their highest rated movie together. They have not worked together since Blue Comet SPT Layzner: Act-III Seal 2000 (1986).