How many movies have Kensho Yamashita and Kunio Miyoshi collaborated on?

They have worked on 4 movies together! Their first movie together was Magnitude 7.9 (1980) while their highest rated movie together was The Return of Godzilla (1984). They have not worked together since Godzilla vs. SpaceGodzilla (1994). They are most known for their science fiction films together.