Akazu Yaki is a form of pottery produced in Seto City, Aichi Prefecture, and is a type of Seto ware, one of Japan's Six Ancient Kilns. It's renowned for being the first to use glaze enamel application, starting with ash glaze in the Heian period. Iron glaze and koseto glaze appeared in the Kamakura period, and by early Edo, seven glazing techniques were established. Additionally, twelve decorating techniques were developed, including flower printing (embossed patterns) and comb marks (wavy, dotted, and swirl patterns). This rich history of glazing and decoration makes Akazu Yaki an outstanding example of enduring Japanese ceramic tradition.