this post was submitted on 02 Oct 2025
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Outside a train station near Tokyo, hundreds of people cheer as Sohei Kamiya, head of the surging nationalist party Sanseito, criticizes Japan’s rapidly growing foreign population.

As opponents, separated by uniformed police and bodyguards, accuse him of racism, Kamiya shouts back, saying he is only talking common sense.

Sanseito, while still a minor party, made big gains in July’s parliamentary election, and Kamiya's “Japanese First” platform of anti-globalism, anti-immigration and anti-liberalism is gaining broader traction ahead of a ruling party vote Saturday that will choose the likely next prime minister.

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[–] it_depends_man@lemmy.world 6 points 1 day ago (6 children)

"Population crisis" is a myth, created by people who want cheap labor. What's the crisis? What's so bad about a declining population number? Spell it out!

It's also possible they are racist.

But if the choice were between racist and greedy, I'm going to bet on greedy 100% of the time.

[–] jagermo@feddit.org 58 points 1 day ago (2 children)

What's so bad about a declining population number?

The biggest issue is probably not being able to play pensions or have people care for the older generation.

[–] Impound4017@sh.itjust.works 28 points 1 day ago* (last edited 1 day ago)

Correct. When we hear concerns about a declining population, the concern (typically) isn’t that a population should always be rising, or even that it shouldn’t shrink, it’s more about the long-term economic stability of the age distribution of a population within the demographic pyramid. If your demography skews significantly older, you’re going to have fewer working age people supporting your economy and more post-retirement age people needing to be supported. This can do double damage to government revenue in particular, as they will see a simultaneous decrease in tax income and an increase in pension payouts, and this can lead to a sharp contraction in the available share of the budget for all of the other government priorities.

It’s a bit ironic in this case, as this is pretty common in developed economies, and typically the way you would offset this is via immigration, as that allows you to tailor your requirements to exactly what you need to balance your demography, and so anti-immigration sentiment is only likely to cause a more severe spiral.

[–] Lumisal@lemmy.world 3 points 1 day ago (2 children)

Here's a simple problem from it: taxes.

If the infrastructure was built to main x people but there's suddenly a huge drop in how many can pay taxes, then you can't maintain the infrastructure.

Say you made trains for a population for a million people. But in a single generation it's going to drop to about 700,000 people.

Those 700k are now going to have to pay nearly 1/3 more just to keep the same trains running. Drop that population further another generation and the cost will only go up. Yet you can't just not have the trains because the existing people still need transportation.

Now multiply that problem to everything else that needs maintenance and is essential in a modern society - universal healthcare (which gets an added extra cost of older people costing more than younger), sewage, roads, natural disaster mitigation, etc. Even taxing the rich like crazy won't make up for it if it's bad enough, and that's in a system where you assume the population goes down because basically everyone has at least one kid. What Japan is facing is most of the population having no kids, and this is after there being a baby boom at some point. That's an extremely steep drop.

That's not even getting into the housing issues with such a densely designed cityscape like Japan has. If there's too many apartments, they'll just start closing down at some point rather than just going down in cost because apartments act kind of like a micro city in costs, and a lack of tenants because there's just no people to fill the space is the same issue as the trains mentioned earlier. This one takes longer to manifest though.

[–] gandalf_der_12te@discuss.tchncs.de 1 points 7 hours ago (1 children)

okay then i guess you should think about what rate of population decline is acceptable? like, you're saying the current rate is unacceptable; where do you draw the limit and why?

[–] Lumisal@lemmy.world 1 points 4 hours ago

Ideally they are matched to productivity and wage rates. So if productivity goes up 50%, and wages go up 50% (pw), with population being (k), then I think ideally it would be

K(-r%)=pw(r%)

But, humans don't follow consistent rules in that particular way, so just somewhere around pw.

Alternatively, if they stagnate equally, that would be sustainable too. Not much decline or increase.

[–] it_depends_man@lemmy.world 2 points 1 day ago (1 children)

Those 700k are now going to have to pay nearly 1/3 more just to keep the same trains running.

That's assuming you only tax income.

Even taxing the rich like crazy won’t make up for it if it’s bad enough

Yep, not buying it. Let's tax them like crazy first, for 20-40 years and when that has actually failed, we can talk about next steps.

[–] Lumisal@lemmy.world 1 points 18 hours ago (1 children)

That's assuming you only tax income.

No, it's not. The maintenance still has to be paid somehow, whether that's from a VAT, income tax, inheritance taxes, etc. Either way, taxes will go up because there's less people but the same amount of infrastructure.

Yep, not buying it.

You're not buying... Basic math? Well, if you want small numbers as an example (and we'll even make it so in the example the rich would be paying a lot now so it's more fair):

There are ten people: 1 (Sherry) has 10 pieces of candy, 8 with 1 pieces of candy, and 1 with no candy. The amount they have resets at the end of every year after tribute.

They must pay the candy monster 10 pieces of candy every year or it'll eat them. Currently, Sherry gives 8 pieces, 8 people give 25% a piece, and Bob gives none.

Next year, some people decide to "move". There's now 5 people, including Bob and Sherry.

In order to make the required tribute, Sherry gives 9 pieces, 3 others give 33% a piece, and Bob still can't give any.

Next year, more people leave. There's now 3 people, including Bob and Sherry.

How much should Sherry give this year, and how much will she have left after giving versus the other person (excluding Bob)?

This little math problem is basically a simplified version of the population collapse problem. In reality, it's worse, because with less people, there's less candy (money) generated for everyone, including Sherry, but the candy monster (infrastructure) will still ask for the same tribute.

[–] it_depends_man@lemmy.world 0 points 18 hours ago* (last edited 18 hours ago) (1 children)

In order to make the required tribute, Sherry gives 9 pieces, 3 others give 33% a piece, and Bob still can’t give any.

This little math problem is basically a simplified version of the population collapse problem.

the candy monster (infrastructure) will still ask for the same tribute.

Yeah, you're doing the math wrong, because maintenance cost goes down the less people there are. And the share of actually critical work is way less than what's actually being... worked, so shifting some parts of the luxury production to critical production is trivial, it just needs to be done and the people doing the critical work need to be paid well enough to make the switch.

That's it.

[–] Lumisal@lemmy.world 1 points 18 hours ago (1 children)

Yeah, you're doing the math wrong, because maintenance cost goes down the less people there are.

Do you have evidence for that? Because I already explained how it doesn't earlier.

A half full train still runs the same track and route. A half used sewage system still needs to be filtered, cleaned, and repaired. Half used roads are still fully exposed to the elements. Half used buildings still degrade from time. Half empty buses are still used to get around.

The medical systems in this case, like I mentioned earlier, however, only go up in use.

[–] it_depends_man@lemmy.world 1 points 17 hours ago (1 children)

Because I already explained how it doesn’t earlier.

You didn't explain it, you asserted that it does and then gave no evidence.

A half full train still runs the same track and route. A half used sewage system still needs to be filtered, cleaned, and repaired. Half used roads are still fully exposed to the elements. Half used buildings still degrade from time. Half empty buses are still used to get around.

I want the actual numbers, as proof.

I want you to actually look up, how much it actually costs citizens and society to have for example, running and sewage. I want you to actually calculate how much that would go up.

Like...

Half used buildings still degrade from time.

Nobody will do this. They will use the 50% of the buildings at 100%. Same maintenance cost.

For example, let's say everyone's electricity bill is 50$... Out of your wage of what 1500$? 2000$? So if population declines by 10% and the electricity bill goes up by 10% or 5$ you're telling that it will collapse the nation?

And while all of that happens: keep in mind that real estate value and prices will go down. Less people means less need for living space. It means it will be cheaper to move to cities, with higher concentrations of people in areas that already have infrastructure, that's already mostly paid for.

[–] Lumisal@lemmy.world 2 points 14 hours ago (1 children)

If you want that type of detailed analysis report then, I give you two options:

  1. Pay me, because that shit takes a lot of time.
  2. Actually look up that exact information yourself from existing reports and back up your own initial claims with exact numbers. Inexact questions will result in estimated answers. If you actually want to know the truth, try to prove yourself wrong instead of asking something in a random thread and not even looking into all the answers you get, instead repeating your own assertions.

As for your other hyperbolia:

For example, let's say everyone's electricity bill is 50$... Out of your wage of what 1500$? 2000$? So if population declines by 10% and the electricity bill goes up by 10% or 5$ you're telling that it will collapse the nation?

The issue isn't that places on Japan are facing a 10% population decline. It's that they're facing a 50+% generational decline. That distinction is important because if it was only the elderly population that dropped, there actually wouldn't be as much financial stress or labor issues to support systems as currently, where the elderly population grows massive while the younger one shrinks drastically.

It isn't a 500¥ increase that's the issue, it's the rise of everything that'll be the issue, especially since the elderly will be the overwhelming majority.

And while all of that happens: keep in mind that real estate value and prices will go down. Less people means less need for living space. It means it will be cheaper to move to cities, with higher concentrations of people in areas that already have infrastructure, that's already mostly paid for.

That's not how modern real estate works. Cities would become more expensive to move into - because it'll have the higher infrastructure costs, it'll be mostly filled with the elderly, but most importantly, because many apartments will be shutdown due to growing vacancies making it unprofitable. If modern cities were mostly houses, then everything would actually be great. But because they're mostly apartments, it becomes an issue. If anything, it'll be cheaper to move out of the cities, because public transportation will be underfunded anyway, and infrastructure costs in rural areas will become lower because rural areas are designed for smaller populations and less people, unlike cities. Cities will just keep getting more expensive to maintain - that's an effect you can already see in multiple countries.

[–] it_depends_man@lemmy.world 0 points 9 hours ago

no, though I understand that it's effort.

Also no, because the whole thing is YOUR CLAIM, and I'm not going to go around looking for evidence to disprove random theories on the internet.

And the rest of your comment again relies on statements that may or may not be true and both of us don't have the data that could be used to decide either way.

sidenote:

instead repeating your own assertions.

That's what you are doing. I'm just calling you out on it.

[–] FaceDeer@fedia.io 14 points 1 day ago (1 children)

The crisis isn't simply from a declining total population number. It's from the demographic shape of that population. Here's Japan's population pyramid. As you can see, it's not really a pyramid - it's heavily weighted at the older end. As people continue to age that big bulge reaches retirement, and then you have more people retired than you have people still of working age. This causes a number of problems.

[–] ameancow@lemmy.world 5 points 1 day ago (1 children)

It's a massive problem when you have an older population outnumbering a younger population. We have a system that is built and designed around a certain number of able-bodied workers supporting the structures that this labor is built on.

It doesn't even take very much to wreck economies and send nations into depressions or catastrophic collapse. Wartime in history has hurt small percentages of populations and caused this effect, but the declining birthrates we're seeing around the world are going to be worse in the long run than even all the plagues and wars if the trend continues.

The problem is nobody can talk about it because so many authoritarians and fascists have coopted the issue and made it about ethnicity and immigration. This is a huge problem so don't let the narratives spin you around.

Our problem is, once again, lack of community. In a world of information and isolationism, we're not nurturing each other in positive ways, we're not sharing love and empathy, we're not helping each other so why would anyone want to have kids? To say nothing of the incredible costs of living that are basically preventing people from even having free-time, much less 18 years of focus on raising another human being. We don't have paid leave, we don't have wages that can support a growing family, we don't have child-care and healthcare in much of the world, we don't have incentives to bring children into the world and even for people who have all that lined up, there's a lot of dread and pessimism towards what the future will be like, so people are also making a moral decision not to inflict more suffering on people who didn't consent to being born.

I don't see a solution that doesn't involve major social reform. Cities will crumble, economies will collapse, and maybe eventually something better will come from it.

[–] it_depends_man@lemmy.world 1 points 1 day ago (2 children)

Ok, but all of the things you listed are reasons why I would like this kind of economic system to decline. It's what's creating these circumstances and problems in the first place.

[–] ameancow@lemmy.world 1 points 1 day ago

I'm not sure how people here can say they're against genocide in other countries while praising and fantasizing about the collapse of society. The death and suffering would outweigh anything we've seen so far before any kind of equilibrium is reached.

I guess you can just go ahead and have your apocalypse fantasies, you will probably continue to live in comfort even as countless people are displaced and made refugees from population decline, environmental changes and the wars that will be sparked as a result.

[–] FaceDeer@fedia.io 1 points 1 day ago

The problem is that the "decline" is going to be accompanied by a mountain of people living in miserable squalor or simply dying. That's the crisis that needs a solution. If a change in economic systems can solve it then sure, do that, but coming up with the details of how that'll work is the hard part.

[–] Merlin@lemmy.zip 8 points 1 day ago (1 children)

There’s an excellent video that explains all the ramifications of populations decline and it’s not only an economical nightmare but also a cultural obliteration as well over time. They use South Korea as an example but mention that even the US is heading this way but has another decade or so before it gets really bad.

https://youtu.be/Ufmu1WD2TSk

[–] Varying9125@lemmy.world 1 points 1 day ago

if this is all true it makes me wonder how can a country like Russia continue to exist? is it because old people just die and no one cares?

[–] remon@ani.social 4 points 1 day ago

It's not so much the decline but the ageing. A society mostly consisting of OAPs can't support itself.