Currently in Okinawa, there are 14 Traditional Crafts designated by the Ministry for Economy, Trade and Industry (経済産業大臣指定伝統的工芸品), 12 of which are Okinawan textiles.
The 12 Okinawan textiles as well as the links to their cooperative associations are as follows:
Brochure '沖縄の工芸' published by Okinawan Prefectural Government
If you see Okinawan fabric that has fresh green and sunny yellow color, that would be Uji zome/ウージ染め in Tomigusuku City. Uji Zome uses sugar cane as dyeing color. Uji means sugar cane in Okinawan dialect.
Similar to aloha shirts in Hawai'i, kariyushi shirts can be worn in summer as casual, informal or dress wear. In Okinawa, business people wear kariyushi shirts as 'business clothes.'
Information on kariyushi shirts: (available only in Japanese)