How many movies have Eiji Tsuburaya and Someshō Matsumoto collaborated on?

They have worked on 7 movies together! Their first movie together was The Human Vapor (1960) while their highest rated movie together was Ghidorah, the Three-Headed Monster (1964). They have not worked together since The War of the Gargantuas (1966). They are most known for their science fiction films together.