How many movies have Buronson and Takashi Watanabe collaborated on?

They have worked on 4 movies together! Their first movie together was Sanctuary (1996) while their highest rated movie together was New Fist of the North Star: The Cursed City (2003). They have not worked together since New Fist of the North Star: When a Man Carries Sorrow (2004). They are most known for their animation films together.