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Indigo Blue: The Dyeing Art of an Age Old Tradition

Various shades of Japanese Indigo blue

Japanese Blue

The beautiful, deep rich color of indigo blue has come to be called "Japanese blue".

Ai (藍), as it's known in Japanese, is made from the leaves of the Japanese indigo plant and was initially used by aristrocrats and samurai. It can now be found adding color to everything from kimonos to clothing like blue jeans and linens. Sadly, most of the indigo color we see now is made synthetically.

Japanese Indigo leaves

A Dyeing Tradition 

The traditional way of making indigo dye or aizome (藍染め) can take a year to produce.

Traditional method of drying Japanese indigo leaves using a broom in the sun

First the leaves are harvested and dried in the sun while being flipped repeatedly by a broom. Next they are fermented to create sukumo, a concentrated version of the dye. This is mixed with lye and lime before being fermented again. The depth of colour will depend on the length of time the sukumo is left to ferment.

Traditional method of fermenting Japanese indigo leaves

Currently only 4-5 producers, all located in Tokushima Prefecture in Shikoku, make sukumo the traditional way. It's known as “Awa-ai” and is famous for its distinct, premium color.

A variety of shades of Japanese indigo blue

Indigo is so beloved in Japan, that the Japanese have a multitude of names for the all the shades of blue produced: from the lightest, almost white shade known as aijiro (藍白) to the darkest, deepest shade called noukon (濃紺).


Indigo blue bandanas made by Curious Corners, a New York based company founded by Sayaka Toyama.

We want to bring you closer to this beautiful tradition and have partnered with Curious Corners, a New York based company founded by Sayaka Toyama, to give away five (5) of their one-of-a-kind, hand-dyed Japanese Indigo bandanas. Learn more HERE.







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