How many movies have Koshino Ryuu and 正塚晴彦 collaborated on?

They have worked on 1 movie together! Their first movie together was マジシャンの憂鬱／MAHOROBA－遥か彼方YAMATO－ (2007) and was their highest rated movie together. They have not worked together since マジシャンの憂鬱／MAHOROBA－遥か彼方YAMATO－ (2007).