Japan’s ceramics have a long history. Among many types of Japanese ceramics, kilns that started in medieval and has been continuing to the present day for more than 800 years are called “Roku Koyo”, literally means six old kilns. In medieval times, main production districts were in the center of Japan main island near current Nagoya city, and then expanded to other regions. The characteristics of the ceramics are mainly determined by clay and glaze. Each kiln has cultivated its own beauty and attractions. Old potteries look simple for daily use, but their expression is powerful and attracts modern people, too.