The Size of the Ninja World and Some Speculation

Sanada Tomohisa drew a map of the ninja world on the blackboard that Shuichi found very familiar. As he explained and Shuichi compared it with his memories of the original work, the shape of this world became increasingly clear.

First of all, this world really was a planet roughly the size of Earth, since a day here also lasted twenty-four hours. Next came the size of the ninja world's landmass, which interested Shuichi the most. The most useful reference point was that it took at least three days to travel from Konoha to Sunagakure by the fastest route.

Not long after Shuichi arrived in the Naruto World, he had plenty of free time and had calculated this once.

In his previous life, the world's top marathon runners could run twenty kilometers per hour. Meanwhile, everyone in this world had around 130 trillion cells, roughly three times as many as people from his previous life.

Even with the boost of Chakra, ninjas still traveled on two legs.

Moreover, Sanada Tomohisa had said that ninja marches needed to maintain formation at all times and rest at intervals. Standard movement followed a cycle of traveling with Chakra, running with pure taijutsu, and resting at designated points. Teams composed entirely of Chunin and above would certainly rely mainly on Chakra to travel.

By Shuichi's estimate, if Chunin-level and stronger ninjas traveled using Chakra, their normal speed should be around eighty to one hundred kilometers per hour.

At the same time, considering that they would have to stop often—for instance, slowing down at night because they were vulnerable to ambushes—covering fifty or sixty kilometers per hour was a fairly normal figure.

In the original work, the ones who said it would take at least three days were Kakashi's team and Might Guy's team. The quality of their members could be called a top-tier standard under normal ninja-world conditions. Their mission was undoubtedly S-rank difficulty, and they could potentially be attacked by S-rank rogue ninjas on the way to rescue the leader of an allied village.

Under such circumstances, they should have spent at least twenty hours a day on the move, at no less than fifty kilometers per hour. That put the distance from Konoha to Sunagakure at around three thousand kilometers, with an error margin of no more than five hundred kilometers either way. That was already roughly the distance from the east coast to the west coast of Country M in his previous life.

So Naruto and Sasuke saving the world later on really did make sense. The ninja world's continent should have been the planet's main landmass, and the ninjas were not just playing around in a tiny island nation like the manga's country of origin.

So unifying the ninja world is fundamentally unrealistic. After conquering such a huge territory, how would anyone govern it? And how did the ninja wars even get fought?

With only tens of thousands of people in each village scattered across such an enormous map, they would be like water splashed into the ocean. So in ninja wars that lasted for years, 99% of the time should have been spent scouting and probing. Both sides must also have had key locations they absolutely needed to defend. After figuring out the ninja world's size, Shuichi began thinking about information related to future events again.

What the teacher covered afterward was more or less the same, though rather vague. Konoha lay at the center of the Land of Fire, nearly a thousand kilometers from the nearest border and more than fifteen hundred kilometers from the farthest. Detailed maps of major transportation routes were probably important intelligence for every village, so Sanada Tomohisa did not explain them.

This semester's classes really were much more interesting. Everyone felt that the morning lessons had ended quickly, and it was time for the midday break again.

"Eh, Shuichi-kun, you brought so many lunch boxes today. Do you have enough living expenses now?" Yūhi Kurenai had planned to share her lunch with him again, as she had last semester, but found Shuichi's lunch box packed to the brim.

"Yeah. Maybe I've been doing pretty well at school, because the village gives me 5,000 ryo in living expenses every month now. So yesterday, I specifically bought some fresh ingredients and made lunch. Kurenai, how about we trade and try each other's food? Think of it as thanks for helping me so much last semester."

Today, Shuichi had indeed made several dishes he had been best at in his previous life: pork chops in tomato sauce, braised beef in yellow sauce, mapo tofu, and more. Packed in the lunch box, they looked, smelled, and tasted delicious enough to make anyone drool.

"Wow, I never expected Shuichi-kun to be such a good cook. Everything tastes really good."

"Haha, it's all right. When you live alone, you have to cook for yourself often. Maybe I have some talent for cooking too."

Beside them, Ishikawa Tatsuki felt like his heart was aching. He usually went back to his mother's Sushi shop for lunch and rarely brought a lunch box.

Today, on the rare occasion that he had brought lunch to school, he saw that bastard Shuichi sharing his delicious homemade food with a pretty girl. The two were chatting and laughing together. He had known Shuichi for so long, yet only now did he learn that Shuichi could cook at this level.

As though he sensed something, Shuichi noticed that Ishikawa Tatsuki had not left at noon today and looked somewhat surprised.

"Oh, Tatsuki, you brought lunch this semester? Come on, come on, have some of the food I made."

As he spoke, Shuichi picked up a piece of cold dressed radish from his lunch box and placed it into Ishikawa Tatsuki's bowl.

"..."

The afternoon classes were quite interesting as well. Sanada Tomohisa had also noticed that the students were not very interested in the relatively dull history lessons, so when discussing the histories of other countries, he first introduced the combat characteristics of their ninja villages, then interspersed the straightforward historical content throughout.

"Kirigakure is the ninja village of the Land of Water. It should count as the most mysterious of the Five Great Ninja Villages. Located deep in the mountains, its territory is often shrouded in thick mist and completely isolated from the other nations."

"Mist Ninja forehead protectors bear four short, slanted wavy lines. Their ninjas excel at Water Release and close-range blade combat..."

"Rock Ninja Village is located in the Land of Earth, surrounded by rocky mountains and highly defensible. The ninjas in that village are skilled in Earth Release techniques and like to gather in groups to use ninjutsu together to alter the terrain..."

After school began, Shuichi returned to a healthy, regular routine. Through repeated daily practice, his ability to extract Chakra had improved tremendously.

Starting from the second week of last semester, he had been able to quickly extract Chakra while standing still. Through day after day of training, by the time this semester began, he could already extract Chakra while running.

In other words, when it came to the Chakra Extraction Technique, Shuichi had currently reached roughly the standard of a Chunin. He had no way to practice extracting Chakra during taijutsu combat for now, so he could only try it during the bouncing-ball game.

By the second week of the semester, everyone was excited that afternoon because Teacher Sanada Tomohisa had announced that Shuriken training would begin shortly.

The Ninja Academy had a training ground, and Elite Class students had priority in using it. Whenever they had Shuriken lessons, the regular-class students could only be assigned somewhere else.

There were five wooden target posts lined up side by side on the training ground. Since this was their first lesson and they were all children, Sanada Tomohisa brought out a bag of equipment along with several special soft targets.

"Since you're all still young and don't have enough throwing strength, I've decided that we'll use these specially made soft targets for practice throughout this semester. The final exam requirement will be for each of you to throw ten shots.

"Last semester, since you still weren't very familiar with things, I tested your hand seals separately. This semester will be different. Each of you will take the final exam in front of the entire class. If you don't study seriously now and only want to have fun, don't regret it at the end of the semester."

In the original manga, Tenten said they had already been running all day and wanted to rest.

Kakashi said that the rest time was over. Four hours of rest for everyone should not be excessive, right?

Also, the author merely calculated it according to his own ideas. If everyone disagrees with my estimate of the ninja world's size, that's fine.

Imagine having Chakra at Jonin level, then ignoring the terrain and rushing in one direction at full speed for three days. Then look at the official ninja world map, and you should have a rough estimate of the ninja world's size. In any case, it definitely would not be small.