Land of Fire: A Small Area - Popular Science, Information Found Online, Those Interested Can Take a Look

A popular science look at the area of the Land of Fire.

To study the question of how large the area is, one must first clarify the issue of speed.

Just how fast is the movement speed of a ninja?

First, there is a fundamental premise: a ninja's body is composed of 100 trillion cells, whereas an Earthling's body consists of 40 to 50 trillion. With nearly triple the cells at the same height, the physical strength and speed of an ordinary person in the Naruto world would be at a crushing level compared to an Earthling. The world record of nine seconds for a 100-meter dash on Earth would likely not even qualify a person as a formal athlete in the Naruto world.

Then there is the amplification of Chakra. Chakra is a transcendent power; when attached to the body, it can increase movement speed. One can see that even teenage students who have just graduated from the Ninja Academy can scale walls and leap across roofs, moving as if they were teleporting.

And the speed of an adult ninja is only faster.

Some fanfiction authors have set the speed of Ninja Academy students to be faster than a train, that is, 100 to 200 km/h. I believe this data is quite reasonable; the derivation process is as follows.

The length of a marathon is 42.195 kilometers, or about 42 kilometers. The record for an Earthling to run the full distance is within two hours. Konoha genin Rock Lee could run around the village 500 times while doing handstands. It is evident that for a jonin, if they are just running normally, the word "fatigue" is meaningless. Meanwhile, Usain Bolt's 100-meter record of 9.58 seconds translates to 37 kilometers per hour.

The physical fitness of an ordinary person in Naruto is three times that of an Earthling. A student at the Ninja Academy would slaughter ordinary people at a ratio of one to a hundred, and a jonin would likewise slaughter an ordinary genin.

Pure speed cannot be multiplied, but for full-speed advancement, multiplying by ten is absolutely no problem, and for long-distance marching, multiplying by two is also no problem.

From this, it can be deduced that a ninja's long-distance marching speed is about 70 km/h, which is roughly the speed of a car, and their full-speed advancement is about 700 km/h, which is roughly the speed of a modern high-speed train.

It takes three days of travel for Konoha to reach the Land of Sand. If they travel at a constant speed for 8 hours a day, that is 70 * 8 * 3 = 1680 kilometers. China is about 5500 kilometers from south to north, so from this, we can deduce that the Land of Fire is about one-fourth the size of China.

However, considering the context, the emergency situation at the time, and the fact that Kakashi is an elite jonin, he clearly could not have traveled at the average speed of an ordinary ninja, nor could he have only run for 8 hours a day. It is possible that excluding 7 hours of sleep and half an hour for meals, the speed could have soared to 100 km/h. That would be 100 * 16.5 * 3 = 4950 kilometers.

Very well, Konoha is as large as China.

To further corroborate this with Pain's words, to destroy a nation, one must kill hundreds of millions of people. Given the situation in the Land of Fire that we have seen, most places are sparsely populated with dense forests, and yet there are still hundreds of millions of people. It is entirely possible that the area is as large as China.

Someone might say, if there are so many people, then the armies fighting would only be 100,000 strong? Isn't it nonsense to say it's as big as China!

One must clarify a point: the concept of a ninja is completely different from that of an ordinary person. Ninjas are super-powered individuals; in China, these would be cultivators. It is perfectly normal for there to be 10,000 cultivators among 100 million people—a one-in-ten-thousand chance!

This war of 100,000 people is not a war of ordinary people; it is a war of transcendent beings. Using the skirmishes between ninja villages in Japan's Warring States Period as an analogy is imprecise, unreasonable, and unscientific; it completely abandons the setting to look only at the numbers.

Although Konoha is large among the Five Great Nations, the other countries are not much worse. Added together, it is about 80 million square kilometers, which is more than half of the Earth's land area.

Let us discuss the issue of Mount Myōboku. It takes a month to walk to Mount Myōboku; is that a slow stroll or a constant-speed advance?

This statement comes from the Toad Sage, directed at Naruto. Judging by the context at the time, this was clearly a result calculated based on Naruto's speed, and it was clearly not aimless wandering, but a rapid arrival with a clear goal in mind.

Therefore, this speed should still be calculated at 70 km/h. Given Naruto's high stamina, this figure might even be higher.

At 70 km/h, traveling 16 hours a day with the remaining eight hours used for sleeping and eating, the distance from Mount Myōboku to Konoha is 70 * 16 * 30 = 33,600 kilometers. The Earth's circumference is 40,000 kilometers.

Clearly, these 33,600 kilometers represent the shortest distance, meaning the circumference of the planet in the Naruto world is definitely greater than 67,000 kilometers.

This is a planet larger than Earth. Because of the greater gravity, the people of this world evolved stronger physical constitutions; humans of the same volume have a cell density three times that of Earthlings.

Because of this, carving a piece out of this planet to form the moon had no effect on the planet itself, and even the planetary orbit and such remained very stable.

Also, because the planet is so conspicuous, it was easily discovered in the vast universe by the Otsutsuki Clan, who specialize in planting the God Tree to harvest the planet's Chakra.

Another piece of evidence to judge that this planet is larger than Earth: if the ninja world were truly smaller than Japan, the planet's gravity would likely only be a fraction of Earth's.

With the physical fitness of a ninja, why would they still run on trees? Wouldn't flying directly be faster?