Indigo dyeing is one of the many kinds of Japanese traditional dyeing. It is not just blue but deep blue in color. I had a first hand experience of Indigo dyeing in Ai-no-yakata where travelers can try Indigo dyeing. It is one of popular activities in Tokushima for travelers. Products made from Indigo dyeing using Indigo plants have antibacterial effectiveness for users and mild mosquito repellent properties.