The 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. How to use lather soap and apply to treatment areas. Leave the soap on for up to 30 seconds. Apply once per day and increase to twice a day if well tolerated. If dryness occurs follow with a moisturizing cream. Safety: before use, perform a spot test to test for sensitivity as follows: lather the soap up and apply to the intended area of use for up to one 30 seconds. If rash, burning, tingling or inflammation occur, immediately remove the product from skin and discontinue all further use. Note: all skin whitening products should be used in conjunction with sunscreen.