Tsuboya-yaki Sake Cup Made by Eizaburo Aragaki Diameter: Approximately 7.5cm, Height: Approximately 5cm The strength comes from the simple, high-quality clay, making it a piece you'll want to use for many years. Eizaburo Aragaki: A master craftsman who established the foundation of Tsuboya-yaki, one of the "Three Great Men of Tsuboya."