How many movies have Michiko Ikeda and Tomoyuki Tanaka collaborated on?

They have worked on 9 movies together! Their first movie together was Godzilla vs. Megalon (1973) while their highest rated movie together was Godzilla vs. Biollante (1989). They have not worked together since Godzilla vs. King Ghidorah (1991). They are most known for their science fiction films together.