Amami Oshima is strongly associated with mud-dyeing and Oshima Tsumugi silk, but indigo dyeing and plant dyeing are also thriving. Yoshikawa Kobo's indigo dyeing uses "Ryukyu indigo," unique to Amami. The concentration of its blue is said to be 3.8 times stronger than that of Polygonum indigo. One of the reasons Yoshikawa chose Katoku as a dyeing location was the water quality. After testing the water quality throughout Amami, they found that Katoku had the cleanest water. The process of arriving at the real thing: They spent five years, as a couple, cultivating a Ryukyu indigo field. And another five years to produce a satisfactory indigo color. It took 10 years to create this deep navy blue. It is a very rare item, not widely available, and its deep indigo has a unique presence. 80 x 33 Mid-century Karimoku Old Karimoku karimoku Antique furniture Vintage furniture Dining chair Desk chair Armchair Armrest chair Domani Otsuka Kagu IDC Actus BoConcept British furniture Italian furniture Maruni MUJI Kashiwa Mokko Mingei furniture Cassina Nagano Interior nagano Isamu Noguchi Isamu Kenmochi Eames