How many movies have Kanta Otsuki and Shinya Inoue collaborated on?

They have worked on 2 movies together! Their first movie together was Foreigner's Mistress Oman: Tempestuous Skin (1972) while their highest rated movie together was Joshidaisei Sex Hôteishiki: Dôsei (1973). They have not worked together since Joshidaisei Sex Hôteishiki: Dôsei (1973).