Traditional Crafts Ryukyu Glass / Okinawa World It is a Ryukyu glass workshop located in Okinawa World in Nanjo City, Okinawa Prefecture. You can take a closer look at how craftsmen make Ryukyu glass. This is a process in which glass is placed in a kiln and melted at a high temperature. Ryukyu glass was first made after the war using discarded bottles of cola and beer that were drunk by the U.S. military stationed in Japan. It is characterized by air bubbles trapped in the glass and colorful colors. You can also experience glassmaking in this workshop. Traditional crafts that can only be found in Okinawa - I will experience them when I go there today.