How many movies have Takaaki Yamashita and Yasuhiko Oyama collaborated on?

They have worked on 4 movies together! Their first movie together was Ghost Sweeper Mikami (1994) while their highest rated movie together was Interstella 5555: The 5tory of the 5ecret 5tar 5ystem (2003). They have not worked together since Interstella 5555: The 5tory of the 5ecret 5tar 5ystem (2003). They are most known for their adventure films together.