How many movies have Hitoshi Yamaguchi and Satoru Namekawa collaborated on?

They have worked on 2 movies together! Their first movie together was Urusei Yatsura: Always My Darling (1991) while their highest rated movie together was Rail of the Star - A True Story of Children and War (1993). They have not worked together since Rail of the Star - A True Story of Children and War (1993).