Kao's proprietary technology "Melanin source (melanocyte producing melanocytes)". Kao's unique active ingredient Chamomirra ET suppresses the production of melanin by W blocking "proliferation" and "activity" of "melanogenic source". The moment when it is spread on the skin, the active ingredient chamomilla ET adheres to the surface, it reaches faster than "melanin source" in the back of the skin and it works better.