Individual results may vary. For some, it may take weeks before you see results. For some type of hair, the coloring effect may be more subtle. The color shampoo is the most effective when used in combination with Rishiri Hair Color Treatment and followed by the color shampoo to maintain the hair color. Using this shampoo alone may not achieve the coloring results for some individuals. Made in Japan. Great for people with sensitive skin and allergies to chemical hair dyes. Rishiri is gentle on your skin and will even improve your hair texture. It keeps the hair color from Rishiri Color Treatment and dyes your hair a little every time you apply. Natural Hair color shampoo with natural ingredients.