Japan has been the canary in the "debt" coal mine of Western countries for the last 30 years. And the canary is now dying. The mix of abysmal population decrease, debt explosion, Yen value crash and lower productivity is about to explode mightily. And when it does, so will the rest of the financial markets around the world.
In less than 20 years, the Yen has lost about half its value with interest rates close to zero over the period, feeding the famous Yen carry trade. This cannot last otherwise the Yen would lose another 50% of its value in the coming 2 to 3 years but at the same time it cannot stop either. Japan is stuck.
These unstable conditions can last a few months but eventually, the Yen will go critical and the market will explode. Either demanding an immediate rise of interest rates that Japan cannot afford or a sharp decline of the value of the money that the Japanese cannot afford, less they become poorer than the Philippines which at the very least can feed itself. Japan cannot. Something is about to happen...
Guest Post by Lau Vegys

What if I told you that something bad is happening with the U.S.
government’s biggest creditor on Earth—and it could have very serious
implications for your portfolio?
This story caught my eye a couple of weeks ago, and I’ve been meaning
to write about it but kept pushing it to the backburner because I had
my plate full at the time. But it’s too important to ignore any longer.
So what’s going on?
Last month, Japan’s Cabinet Office published their latest economic
figures, and they were not good. Japan’s economy shrank for the first
time in a year, contracting by 0.7%.
That’s bad news, especially since it happened even before the bulk of
President Trump’s tariff measures took effect. Now it’s almost a given
that Japan will continue shrinking this quarter, which would put the
country in a technical recession.
I realize you probably don’t spend much time thinking about Japan’s
economy. Most people don’t. It’s on the other side of the world and
doesn’t dominate headlines like the U.S. or China.
But Japan isn’t just any country. It’s one of the biggest creditors on Earth.
Japan holds over $3 trillion in net foreign assets and is the top
holder of U.S. Treasuries—over $1 trillion as of 2025. Take a look at
the graph below.

And it’s not just bonds. Japanese institutions have billions tied up in U.S. stocks, corporate debt, and real estate.
But what happens if Japan suddenly needs to call that money home?
It would send shockwaves through global markets—driving up interest
rates and making borrowing far more expensive for everyone. And because
Japan has its fingers in so many pies, it wouldn’t just rattle Wall
Street… it could light the fuse for the next global recession.
Japan’s Many Problems
To understand why Japan can actually crash global markets, you need
to understand the precarious situation the country is in. And it goes
well beyond one quarter of negative growth.
Japan is facing a deepening population crisis. The nation’s
population has declined for 15 consecutive years as fewer people marry
and have children.
That’s not unusual—many developed countries are grappling with falling birth rates.
But not every developed country has the third-lowest fertility rate
in the world. Japan recently hit a record low of 1.15, down from 1.2 the
year before—the lowest since record-keeping began in 1947.
Keep in mind, you need a fertility rate of about 2.1 to maintain a stable population.
To make matters worse, Japan also happens to be the oldest country in
the world. About 30% of its population is over the age of 65.
Combined, these factors mean that by 2050, Japan is projected to lose
around 20 million people—about 16% of its current population. And by
the end of the century, the country is expected to lose more than half
its population. That’s like the entire state of Florida vanishing now,
and most of the United States East Coast disappearing later.
This crisis affects far more than retirement homes and hospitals—it’s crushing the entire economy.
Fewer workers means less growth. More retirees means rising
government spending. Every below-replacement-level country faces these
problems, but when your fertility rate is plummeting toward 1 and you
have the oldest population on Earth, you’re dealing with a whole new
level of crisis.
The government’s solution to keep the system afloat?
Borrow money. Lots of it.
For decades, Japan has borrowed like there’s no tomorrow, which is
why it now has the highest debt-to-GDP ratio in the developed world:
over 260% and rising.
It was the same familiar playbook: keep interest rates at zero and have the central bank print money to buy government debt.
And for years, Japan got away with it.
Then reality came knocking.
When Math No Longer Works
You might remember Monday, August 5th, 2024. Calling it a bad day in
the markets doesn’t even begin to cover it. Japan’s benchmark Nikkei
index plunged 12.40%—its worst single-day drop since Black Monday in
1987.
The sell-off started in Japan but quickly spread across Asia, then
Europe, and finally the U.S. All told, over $5 trillion in global market
value was wiped out in just one day.
And it wasn’t just stocks. Oil, other commodities, Bitcoin—you name it—everything got hit.
But more striking than the losses was the speed. Things unraveled so fast that even seasoned market pros were caught off guard.
The trigger behind the global meltdown was a financial powder keg known as the yen carry trade.
Here’s how it works…
In a yen carry trade, big institutions borrow Japanese yen at
rock-bottom interest rates. Then they convert that cheap money into
dollars and plow it into higher-yielding assets abroad, especially in
the U.S.
Imagine you’re a trader who borrows 10 million yen when the exchange
rate is 100 yen to the dollar. That gives you $100,000 to play with. You
dump this money into U.S. Treasury bonds yielding 4%. After a year,
you’ve pocketed $4,000 in interest. And it gets even better—if the yen
has weakened to 105 yen per dollar, you only need $95,238 to repay your
loan. You’ve profited not just from the interest rate difference, but
also from the currency move.
It’s essentially free money. At its peak, Bloomberg estimated yen
carry trades reached hundreds of billions globally. Traders had been
milking this cash cow for decades. Some people called it “the global
money glitch.”
But there’s a (predictable) catch.
This strategy only works as long as Japanese interest rates stay low and the yen remains weak.
If either goes the wrong way, the trade breaks.
That’s exactly what happened in 2024. After nearly two decades of
keeping rates near zero, the Bank of Japan finally blinked—raising rates
from negative territory to 0.25%. That alone sent the yen surging 10%
in a matter of weeks.
Suddenly, the math flipped. Traders now needed more dollars to repay
their yen-denominated loans than they had borrowed. That triggered a
violent unwinding of positions—and a cascading sell-off across global
assets.
The rest is history.
Just a Preview
Now, the Bank of Japan didn’t raise rates out of the goodness of its
heart. When you have $8.5 trillion in debt—over 260% of GDP—even tiny
rate increases are brutally expensive.
They were forced to.
Bond investors had started demanding higher yields. Japan’s auctions
had begun failing. The BoJ, already holding 50% of the government bond
market, found itself buying alone. Foreign and domestic investors were
either fleeing or demanding much higher rates to offset inflation and
currency risk.
So the BoJ capitulated.
And with Japan’s problems in 2025 looking worse than in 2024, rates will probably keep climbing—whether they like it or not.
The alternative is even more trouble selling their debt—along with a
yen free fall that would make imports ruinously expensive. And I do mean
ruinously since Japan imports 60% of its food and nearly all of its
fossil fuel energy.
But rising rates in Japan spell trouble for the U.S.
Remember, Japan holds over $1 trillion in U.S. Treasuries—more than
any other country. As Japanese rates rise and the yen strengthens,
parking money abroad gets a lot less attractive. Instead of financing
America’s debt binge, that capital will stay home.
Japan’s finance minister recently even floated the idea that their
U.S. Treasury holdings could be “leverage” in trade talks. He later
backtracked—but the message was clear: nothing is off the table in hard
times.
Losing America’s biggest creditor would crush America’s global credit
standing, hammer the dollar, and drive up borrowing costs across the
board. That would translate into higher interest rates for consumers, a
paralyzed economy, and a brutal market collapse.
When August 5th, 2024 hit, I was struck by how violently U.S. markets
reacted to events in Japan. The speed and scale of the sell-off were
unprecedented outside of the COVID crash in March 2020.
I now strongly believe that was just a preview.