How many movies have Hiroshi Kohara and Hitoshi Kamata collaborated on?

They have worked on 2 movies together! Their first movie together was Dragon Ball Z: Battle of Gods (2013) while their highest rated movie together was Donten: Laughing Under the Clouds - Gaiden: Chapter 1 - One Year After the Battle (2017). They have not worked together since Donten: Laughing Under the Clouds - Gaiden: Chapter 1 - One Year After the Battle (2017).