The New Normal: Japan's "Weak-Yen Bubble" Isn't a Bubble. What Comes After the Weak-Yen Trade

by Kenichi Ogura - Former Chief Editor for Japanese Business Magazine “PRESIDENT”

At first glance, it fits. The yen has traded near 160 yen to the dollar. Japanese stocks have reached record territory. Tokyo property prices have climbed sharply.

But the comparison with the late 1980s is wrong.

Japan today is not living through a broad speculative bubble. The weak yen has clear economic causes, Japanese equities are still backed by earnings, and the rise in asset prices is far too uneven to describe as one nationwide boom.

Speculators Are No Longer Betting Against the Yen

The strongest evidence comes from the currency market itself.

As of September 22, 2026, non-commercial traders in yen futures held 192,274 long contracts and 120,292 short contracts, according to the U.S. Commodity Futures Trading Commission. That left them net long by 71,982 contracts.

In the spring of 2024, net shorts exceeded 160,000 contracts.

So the usual story no longer works. This is not a market in which hedge funds are piling into an ever-larger bet against the yen. In listed futures, speculators as a group are positioned for yen strength.

Yet the currency remains weak.

That points to something more durable than a crowded trade.

The Rate Gap Has Not Closed

The Bank of Japan raised its policy rate to 1.25% in September 2026. The Federal Reserve raised rates in the same month, lifting its target range to 3.75% to 4.00%.

Dollar assets therefore continue to offer much higher yields than yen assets. That does not explain every move in USD/JPY, but it explains a great deal about why BOJ tightening has not produced a lasting return to the exchange rates Japan was used to before 2022.

A Surplus That No Longer Comes Home

Japan's current-account surplus also looks different from the one many investors still have in mind.

The old model was simple: export cars and electronics, run a large trade surplus, bring the proceeds home.

That is no longer the main story.

In July 2026, Japan recorded a current-account surplus of 2.99 trillion yen. Primary income - profits from overseas subsidiaries, dividends, and interest - generated more than 4 trillion yen.

A Japanese company can make money in the United States and reinvest it there. The profit still appears in Japan's balance-of-payments statistics, but no large dollar-to-yen conversion needs to take place.

That weakens the old assumption that a large current-account surplus should automatically strengthen the yen.

Japan's trade position pulls in the opposite direction.

The country recorded a 1.11 trillion yen trade deficit in August 2026. Exports topped 10 trillion yen, but imports exceeded 11 trillion yen.

Japan still imports large amounts of energy, food, raw materials, and industrial inputs. A weaker currency raises the yen cost of those imports and keeps demand for foreign currency high.

There is no need to invent a bubble to explain the yen. Japan still pays lower interest than the United States, still imports a great deal of what it consumes, and increasingly earns overseas income that does not have to be converted back into yen.

Record Stock Prices, Backed by Earnings

Stocks tell a different story.

Record highs alone do not prove a bubble.

The Bank of Japan noted in its April 2026 Financial System Report that stock prices had moved above their long-term trend. Expected earnings per share had also risen, keeping forward valuation measures around their post-2008 averages.

That is very different from 1989.

At the peak of Japan's old bubble, share prices moved far beyond what profits could justify. Market P/E ratios reached extraordinary levels. Land values were supported by the belief that prices would simply keep rising.

Today's market is expensive in places, but profits have risen with prices.

The weaker yen has lifted the yen value of overseas earnings at automakers, machinery groups, electronics companies, and trading houses.

The AI investment cycle has added another source of growth. Semiconductor makers, data-center suppliers, electrical equipment companies, and machinery firms have benefited from global capital spending that has little to do with foreign exchange.

Corporate reform has changed the market as well.

The Tokyo Stock Exchange has pushed listed companies to pay more attention to cost of capital, return on equity, and shareholder value. Buybacks have increased. Dividends have risen. Cross-shareholdings have been unwound faster. Management teams face more pressure to use capital efficiently.

Those are not speculative stories. They affect cash flow.

A Narrow Rally, Not a Nationwide Boom

Some parts of the market are plainly expensive.

The Nikkei 225 is heavily influenced by a small group of high-priced semiconductor and growth stocks. That makes the headline index look more euphoric than the market underneath it.

The broader TOPIX tells a less dramatic story, which is why the two should not be treated as interchangeable measures of "Japan."

A narrow rally led by a handful of expensive technology-related names is not the same thing as a nationwide stock-market bubble.

Property: Where the Argument Gets Uncomfortable

Property is where the argument becomes more uncomfortable.

Prices in central Tokyo have risen sharply. The Bank of Japan has also pointed to growing real-estate lending and foreign purchases of commercial property.

Construction costs have risen. Labor is scarce. Supply is tight. Foreign capital is still active. Investors continue to chase a limited pool of prime assets.

The harder question is whether rents are keeping up.

Property values can rise for a while even when rental income lags. But the longer that gap widens, the harder the numbers become to defend.

Japanese interest rates now make that test tougher.

By late September 2026, the yield on the 10-year Japanese government bond was around 3%. When a government bond yields close to 3%, investors have less reason to accept very low yields on expensive property.

The idea that foreign buyers will keep purchasing Tokyo property simply because the yen is cheap also has a natural limit. Currency weakness can make Japanese assets look inexpensive in dollar terms, but that discount disappears if local prices rise far enough.

Central Tokyo property has overheated in places. That is not the same as saying Japan has a nationwide property bubble.

Households Are Not Part of the Boom

Household data make the broader bubble story even harder to sustain.

Real household spending among households with two or more people fell 3.6% from a year earlier in July 2026.

Corporate profits are high. Share prices are high. Some property prices are very high.

Household consumption is not.

That split tells us more about Japan in 2026 than the word "bubble" does.

The weak yen rewards companies that earn heavily overseas. It helps businesses that hold foreign assets and firms exposed to inbound tourism.

It hurts import-dependent companies and businesses that cannot pass higher costs on to customers. Households feel the same pressure through food, fuel, and other imported goods.

Japan is not experiencing one giant boom. It is experiencing a sharp division between those that benefit from a weak currency and those that pay for it.

Many Forces, Not One Bubble

That is why putting the yen, stocks, Tokyo apartments, and inbound tourism into one box creates the wrong picture.

The forces overlap, but they do not come from one source.

A weak currency has supported export profits. AI spending has lifted a different group of companies. Corporate governance reform has improved shareholder returns. Property has been pushed higher by supply constraints, construction costs, and investment demand. Tourism benefits from the yen, but also from the fact that Japan remains relatively inexpensive for many foreign visitors.

For investors, the useful test is not whether USD/JPY looks extreme on a chart.

It is whether profits still justify share prices, whether rents still justify property values, and whether the gains from a weaker currency can survive once the currency itself stops helping.

For now, Japanese equities still have an earnings base. The yen still has a rate differential behind it. Property has overheated in parts of central Tokyo, but Japan is not showing the broad credit excess that defined its great bubble.

Nor is 2026 a replay of 1989.

An Economy Measured in a Weaker Yen

What has changed most is the value of the unit in which Japan measures itself.

Stocks are quoted in yen. Corporate profits are reported in yen. Property is priced in yen. Overseas earnings are translated back into yen.

When the currency weakens, many of those numbers rise.

That can make the economy look richer than it really is.

But higher prices and higher profits are not automatically fake just because the yen is weak. Some reflect genuine gains in earnings, productivity, capital discipline, and global demand.

The result is an economy split in two.

Global companies have benefited from currency weakness. Asset owners have benefited from higher nominal values. Households and domestic businesses have absorbed much of the cost through higher import prices.

What Comes After the Weak-Yen Trade

A stronger yen would reduce translation gains for exporters, but it would not erase AI demand, capital spending, buybacks, dividend growth, or better bank margins.

A weaker yen would not rescue every company either. Import costs can rise faster than sales, consumer demand can weaken, and domestic margins can be squeezed.

The simple trade - buy Japan because the yen is weak - is losing its usefulness.

The next phase will be about which companies can keep growing once the currency stops doing the heavy lifting.

The weak yen has bought many Japanese companies time, profits, and higher valuations.

What matters now is what they have done with them.