How many movies have Shōichi Ikeda and Tadashi Yoyogi collaborated on?

They have worked on 18 movies together! Their first movie together was Document porno: Chikan maruhi report (1973) while their highest rated movie together was Semi-dokyumento: Zoku nyotai no shinpi (1975). They have not worked together since Taguchi Yukari: Za keiren (1986).