How many movies have Kanpei Kagami and Katsurō Sakai acted in together?

They have worked on 4 movies together! Their first movie together was Poruno da yo! Zen'in shûgô: Maruhi waisetsu shûdan (1974) while their highest rated movie together was Occult Sex (1974). They have not worked together since Molester Train (1975).