How many movies have Kaname Ouki and Okada Keiji collaborated on?

They have worked on 1 movie together! Their first movie together was 愛するには短すぎる／ル・ポァゾン　愛の媚薬II (2011) and was their highest rated movie together. They have not worked together since 愛するには短すぎる／ル・ポァゾン　愛の媚薬II (2011).