The gravest level of hell is that of the Hell of Incessant Suffering. This hell is 20,000 yojana in length and width, and measures 80,000 yojana each in the eight directions. Most of those who fall into this hell will have their bodies enlarged to 80,000 yojana. Their bodies become as soft as cotton and the hell fire burns as voraciously as a fire in a heavy wind, or as deadly as a red-hot iron ball.

In brief, the sinners in the Hell of Incessant Suffering are punished with a devastating fire. There are 13 routes through which a fire spreads in our bodies. There are two fires that start at the feet and go to the head, and there are two fires that start in the head and go down to the feet. There are two other fires that enter from the back and reach the chest. Another set of twin fires enters from the chest and reaches the back. Yet another set of twin fires enters from the left side and reaches the right side. Yet another set of twin fires enters from the right side and reaches the left side. A final single fire descends from the neck down as if clouds are circling a mountain.

The bodies of the sinners that fall into this hell flare up like dried grass burning. Frantically running to and fro, they cannot find any refuge. I am merely explaining the suffering of fire and have left out the various other sufferings for now. Had the Buddha fully expounded the extreme suffering of this hell, people would die from shock. This is probably why the Buddha never preached on this.

Kōnichi Shōnin Gohenji, A Reply to Rev. Kōnichi, Writings of Nichiren Shōnin, Followers II, Volume 7, Page 154