From the Momoyama period (1573-1603) to the early Edo period (1603-1868), "Ko Karatsu" was fired. These guginomi are said to be coveted by sake drinkers, and even today, they fetch high prices, ranging from several hundred thousand to several million yen.

There are several types of kilns for firing pottery. The most common type is the electric kiln, which uses electricity as its heat source. The most common type is the electric kiln, which uses electricity as its heat source, followed by the gas kiln, kerosene kiln, and the wood-fired kiln, all of which are used by artists depending on the characteristics of their work.