Awa Indigo Dyeing — Traditional Blue Textile Craft

Tokushima was historically Japan's leading producer of ai (藍, indigo dye), with Awa indigo (阿波藍) considered the highest quality for its deep, vivid blue color. The region's warm climate, clean water, and skilled craftsmen created an indigo industry that supplied dyers nationwide during the Edo period. Traditional indigo dyeing involves fermenting indigo leaves (sukumo) in earthen vats, creating a living bacterial culture that produces the characteristic blue through oxidation.

Several workshops in Tokushima offer hands-on dyeing experiences where visitors dip white cotton into vat, producing graduated blue patterns through repeated immersions.