How many movies have Kouhei Kobayashi and Okada Keiji collaborated on?

They have worked on 2 movies together! Their first movie together was 愛するには短すぎる／ネオ・ダンディズム！－男の美学－ (2006) 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).