How many movies have Chikao Katsui and Reiko Okuyama collaborated on?

They have worked on 4 movies together! Their first movie together was Arabian Nights: The Adventures of Sinbad (1962) while their highest rated movie together was Belladonna of Sadness (1973). They have not worked together since Belladonna of Sadness (1973). They are most known for their fantasy films together.