How many movies have Aran Kei and Kouhei Kobayashi collaborated on?

They have worked on 1 movie 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／ネオ・ダンディズム！－男の美学－ (2006).