How many movies have Hochu Otsuka and Mitsuru Oshima collaborated on?

They have worked on 2 movies together! Their first movie together was Gunsmith Cats (1995) 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).