100% plant hair dye. No additives such as chemical dyes or preservatives are used. Contains henna, indigo, and 7 kinds of herbs with an original formula. Black hair remains almost unchanged, and gray hair is dyed in a natural brown. You can also feel the treatment effect of henna and herbs. Indigo purchased directly from the field is used. Local staff who are familiar with herbs carefully select materials in our own workshop, carefully check the dyeing power, blend, fill, and inspect the products in Japan, and deliver them.