The Kojic Acid Soap You'Ve Always Trusted, The One Prescribed By Your Dermatologist Is Now Availble In Kojie San Skin Lightening Soap. Kojie San Has An All-Natural Kojic Acid Formula That Helps Lighten Dark Spots Due To Acne, Age Spots, Freckles, Sun-Damaged Skin, And Other Skin Pigmentation. Kojic Acid Was Discovered In Japan. It Is A By-Product Of Koji, Or Malted Rice, For Use In The Manufacture Of Rice Wine. In Cosmetics, Kojic Acid Is Popularly Known For Its Excellent Whitening Effects And Anti-Oxidant Properties.