How many movies have Ryoko Momoi and Shōji Sakai collaborated on?

They have worked on 3 movies together! Their first movie together was Mitsumamire hentai kazoku: Ijiriai (1995) while their highest rated movie together was Maruhi tôsatsu: Shirôto anaba saguri (1995). They have not worked together since Hentai ganbô jitsugen kurabu (1996).