How many movies have Kunio Miyauchi and Masaya Nihei collaborated on?

They have worked on 3 movies together! Their first movie together was Ultraman: Monster Movie Feature (1967) while their highest rated movie together was Akio Jissoji's Ultraman (1979). They have not worked together since Ultraman: Great Monster Decisive Battle (1979). They are most known for their adventure films together.