This is a charcoal stove that uses 4-sun (approx. 12 cm) briquettes made from diatomaceous earth produced in Nanao City, Ishikawa Prefecture. By adjusting the airflow through the air vents, you can control the heat intensity. It can last for about 24 hours. The far-infrared effect makes it ideal for long cooking times, and for outdoor barbecues, it provides a flavor that rivals charcoal grilling.