For a climbing kiln, fire is set by first piling wood in the bottom furnace opening. This warms the kiln and removes any humidity inside. After this firewood is inserted and set on fire on both sides of each chamber in ascending order. In the case of the Yomitanzanyaki North Kiln, it takes about 72 hours to completely set fire inside the 13 chambers. Generally, the process would begin in the evening and finish around noon four days later.