How many movies have Akira Matsuki and Tetsuzô Ôsawa collaborated on?

They have worked on 6 movies together! Their first movie together was Ultraman Cosmos: The First Contact (2001) while their highest rated movie together was Ultraman Mebius & Ultra Brothers (2006). They have not worked together since Superior Ultra 8 Brothers (2008). They are most known for their science fiction films together.