How many movies have Koichi Kawakita and Shinichi Sekizawa collaborated on?

They have worked on 8 movies together! Their first movie together was King Kong vs. Godzilla (1962) while their highest rated movie together was Godzilla vs. Biollante (1989). They have not worked together since Rebirth of Mothra (1996). They are most known for their science fiction films together.