How many movies have Mitsuru Oshima and Naoyuki Onda collaborated on?

They have worked on 2 movies together! Their first movie together was Nasu: Summer in Andalusia (2003) while their highest rated movie together was Berserk: The Golden Age Arc I - The Egg of the King (2012). They have not worked together since Berserk: The Golden Age Arc I - The Egg of the King (2012).