Total population of the EN: about 20 million, probably.

Not certain about this, but I think that's in the right ballpark.
  • The total population is about 300,000 people
  • Konoha is the largest city, at around 30k
  • There are three other major cities (see map), each around 20,000
  • The rest of the population is in small hamlets and farming villages ranging from a few hundred to the low thousands
  • It has the largest shinobi population in the Elemental Nations; the Mist intelligence department puts it at 1k to 1.5k, with the best estimate being around 1200 or 1300
That's the thing, though; with the largest village having 1200-1500 ninja, there's probably something like 10k ninja in the entire world. A single ninja death is a MASSIVE loss to their proportional combat power. More importantly, it takes years to train a ninja, and you need to start young. More importantly, there aren't very many candidates who can become ninja.
This is a hell of a ballpark but assuming the other countries are similarly proportioned the world population goes around 2.4 million.

Clarifying edit: My statement is a ballpark.
 
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I wouldn't make any claims about world population. Historically human population has been vastly concentrated in a few breadbasket regions that have tremendously larger populations than any other areas. No real way to tell where this tiny slice of the world falls in that.

As for what the appropriate population density for the Elemental Nations is... the danger of chakra beasts is going to keep population down, obviously, but by how much? I'd suggest maybe you could ballpark population density to regions of pre-modern Africa, which as the continent humans evolved on has the set of predators most adapted to us.
 
The most powerful force for which we have any evidence for are the Watchers. They seem benevolent, or at least responsible. Why haven't they enforced peace? Do they think themselves incapable, or do they not care? If they can be influenced or helped, they might be the only gun big enough for bigger gun diplomacy. Even then they might be below Madara, the Sage, or Kaguya.

What makes you think the Watchers are all that powerful? From what little I can remember of them it seems like they might be able to be as little as just a few S rank ninja with a trick that lets them detect sealing failures so they can investigate whether they were deliberate. That's not nothing, but it's not enough to enforce peace on the elemental nations.
 
What makes you think the Watchers are all that powerful? From what little I can remember of them it seems like they might be able to be as little as just a few S rank ninja with a trick that lets them detect sealing failures so they can investigate whether they were deliberate. That's not nothing, but it's not enough to enforce peace on the elemental nations.
They presumably have the ability to sneak up on a WWII age Jiraiya undetected while avoiding and disarming all of his traps and defenses.
 
What makes you think the Watchers are all that powerful? From what little I can remember of them it seems like they might be able to be as little as just a few S rank ninja with a trick that lets them detect sealing failures so they can investigate whether they were deliberate. That's not nothing, but it's not enough to enforce peace on the elemental nations.

A group of S rankers with nothing anyone can retaliate against (even if just because no one knows where to target) can do a heck of a lot if they want to. They could declare that they'd side against any village that goes to war, and if they're savvy and precise enough they could convince the villages that no, pretending they attacked first is not an excuse.

S rankers with nothing to defend can wait until most of your heavy hitters are off on a major mission and burn your village to the ground with no consequences. The Kages would know that making The Watchers their enemy could be a death sentence for their village, and if The Watchers wanted you to not go to war then what are you gonna do about it?
 
S rankers with nothing to defend can wait until most of your heavy hitters are off on a major mission and burn your village to the ground with no consequences. The Kages would know that making The Watchers their enemy could be a death sentence for their village, and if The Watchers wanted you to not go to war then what are you gonna do about it?

Make money? Prosper? Make babies? Kill chakra beasts?
 
A group of S rank ninjas that said they would destroy every village if any of them went to war, and had demonstrated the force to back that up, would be quite a potent motivator, yes.
 
What makes you think the Watchers are all that powerful? From what little I can remember of them it seems like they might be able to be as little as just a few S rank ninja with a trick that lets them detect sealing failures so they can investigate whether they were deliberate. That's not nothing, but it's not enough to enforce peace on the elemental nations.

The world hasn't ended yet, and my understanding of sealing failures is that it really, really, should have. A single self replicating sealing failure is a village ending attack, and more importantly is obviously a village ending attack. An insane amount of resources would be dedicated to weaponizing this in secret.

The fact that we don't see self replicating sealing failures either means that self replicating seals are impossible to so much as get started on even with a century of village level resources, or that anyone who tries is stopped. Or that the Watchers have done something to make even Kage too scared to cross them, even when they think the survival of their village might be on the line.
 
The world hasn't ended yet, and my understanding of sealing failures is that it really, really, should have. A single self replicating sealing failure is a village ending attack, and more importantly is obviously a village ending attack. An insane amount of resources would be dedicated to weaponizing this in secret.

The fact that we don't see self replicating sealing failures either means that self replicating seals are impossible to so much as get started on even with a century of village level resources, or that anyone who tries is stopped. Or that the Watchers have done something to make even Kage too scared to cross them, even when they think the survival of their village might be on the line.

Or possibly that any sealmaster who tries to make an unbounded self-replicating seal effect gets killed by a seal failure while they're still in the bounded self-replicating area. I know either Kagome or Jiraiya said that the portal the Rift Denizens were coming out of would stop by itself over time, so I can see it being really hard to get a self-replicating effect that doesn't stop at 'lethal to nearby people' level.
 
Or possibly that any sealmaster who tries to make an unbounded self-replicating seal effect gets killed by a seal failure while they're still in the bounded self-replicating area. I know either Kagome or Jiraiya said that the portal the Rift Denizens were coming out of would stop by itself over time, so I can see it being really hard to get a self-replicating effect that doesn't stop at 'lethal to nearby people' level.
I agree, I suspect the amount of damage a seal failure can do is limited by exhausting the chakra used to infuse it. (Weird causation breaking time travel stuff aside.) So while an unrestrained gateway somewhere Outside would invite a bunch of monsters in, it wouldn't be an endless horde.

As for how the Watchers detect sealing failures, they're probably dramatic events to some sort of carefully calibrated detection seal specialized in picking up on dimensional ruptures or something. That's how I'd try to do it, anyway. You set up a network of them that propagates reports of positive detections across the whole network so you don't need a Watcher at each detector.
 
That would be ideal and I'll bet we could get Tsunade behind it if we started with a medical college.

Medical class and medical ninjajustu?

As long as we put Kagome in charge of Sealing education with some supervisory shit done by Jiraiya then Im game.

I think Kagome would like to be a teacher to be honest. 80% of your class will likely be unnappreciative snotnosed brats, but the other 20% really make it worth it.


I did just spend 10 hours worth of my day in office hours helping promising students with advice on personal projects, final exams, and general life advice(ha, like I have anything better then the next 10 sections of the GameFaqs guide to *that* ) so take that with a grain of salt.
 
As long as we put Kagome in charge of Sealing education with some supervisory shit done by Jiraiya then Im game.

I think Kagome would like to be a teacher to be honest. 80% of your class will likely be unnappreciative snotnosed brats, but the other 20% really make it worth it.


I did just spend 10 hours worth of my day in office hours helping promising students with advice on personal projects, final exams, and general life advice(ha, like I have anything better then the next 10 sections of the GameFaqs guide to *that* ) so take that with a grain of salt.

We're talking higher education for ninja (and arguably nobles), not snotnosed brats.
 
And the most populous city in Fire country is Konohagakure with only 40,000.
30,000, actually.
This is a hell of a ballpark but assuming the other countries are similarly proportioned the world population goes around 2.4 million.

Clarifying edit: My statement is a ballpark.
Whoops. I fail math forever -- I slipped the decimal point. Yes, on the order of 2 million, not 20 million. Thanks for the catch.

Does the EN include the eastern continent too?
Yes. Everything on the map:
 
We're talking higher education for ninja (and arguably nobles), not snotnosed brats.
CCNJ:

Excuse the following emoji reaction to your statement (not to you as an individual of course) but my patience for education related matters is quite thin after today:

:rolleyes:

Being a snot-nosed brat is often independent of profession and age. I've had about a dozen undergrads show up to my office the past week complaining about how they're failing my class despite never showing up to a single damn lecture. A few of these might be ballparked at Mari's age, actually.

Now, Im sure by the time you're a Jonin in your mid 20s you have your shit figured out (or you're too powerful to care), but after seeing how samples of the various Genin and Chunin proctors in the Chunin Exams have acted, it would take a significant amount of evidence to convince me that my guesstimate of snot-nosed-brattyness does not hold modulo some scaling factors.
 
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