How many movies have Kenji Kawasaki and Yasuko Sawaguchi collaborated on?

They have worked on 3 movies together! Their first movie together was The Return of Godzilla (1984) while their highest rated movie together was Godzilla vs. Biollante (1989). They have not worked together since Godzilla vs. Biollante (1989). They are most known for their science fiction films together.