This Skin Brightening Soap by Original Kojie San is the foundation of any good skin brightening regimen. These brightening soaps are proven to effectively treat hyperpigmentation, dark spots, acne scars, and melasma. With regular use, you will start seeing results in a matter of weeks.original kojic acid lightening soap, Kojie San's formulation blends effective whitening ingredients with nourishing coconut oil and a fresh orange fragrance. Kojic acid was discovered while processing rice for Japanese wines. The naturally derived ingredients in this soap have been proven to safely and quickly reveal even skin by gently smoothing away dark spots, discoloration, and other imperfections