The "dance of the fire God," which has been passed down to their family along with the earrings, has been passed down to him by his father. Hence, he knew the "dance steps." He uses those "dance steps" as the base for his techniques. While fighting Rui, Tanjirou remembered about the dance of the fire God and that his father actually uses a breathing style while performing the dance. Hence, he tried to use the dance steps along with the breathing style that his father taught him and it worked. He also said to Senjurou about not being able to perform dance of the fire God perfectly, so if he can perfect it, it would be more powerful than before.