How many movies have Go Kuga and Kōju Ran collaborated on?

They have worked on 9 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 Semi-dokyumento: kankō basu - nure nure jakku (1977).