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.