21.08.2026 - Japan - Rising Inflation, Mounting Dilemma

Japan’s inflation pressures are building again at a challenging time for the economy.

Headline inflation accelerated to 1.9% in July, the highest level this year (up from 1.6% the month before), driven partly by rising energy costs following the Iran war. Core inflation, excluding fresh food but including energy, came in at 1.8%, in line with expectations.

Energy prices increased for the first time since November 2025 despite government subsidies, reflecting the sharp rise in oil prices caused by the conflict in the Middle East.

The pressure is even more visible further up the supply chain. Wholesale inflation reached 7.2% in July, with electricity charges making the largest contribution. This raises the risk that higher input costs will increasingly be passed through to consumers over the coming months.

Food inflation is adding further pressure, with fresh food prices jumping 7.0%, up sharply from 3.9% in June.

Markets:

• Equities: The Nikkei 225 index closed slightly lower

• Bonds: The trend toward higher yields continues, Japan 10y yield 2.88%, 30y yield 4.06%

• Currencies: Japanese Yen almost unchanged despite higher yields, USDJPY 159
  

My View: Japan is increasingly caught between inflation, currency weakness and a cooling economy.

Higher inflation is certainly not what Japan wants to see at this point in the economic cycle.

The combination of higher energy prices and a persistently weak yen is particularly problematic for an economy heavily dependent on imports. A weaker yen makes energy and other imported goods more expensive, creating additional inflationary pressure.

This explains why Japan has a clear interest in a stronger currency.

However, the latest intervention in the yen provided only temporary relief. Its impact faded quickly, and the broader weakening trend remains intact. More importantly, even significantly higher Japanese bond yields have so far failed to provide meaningful support for the currency.

At the same time, recent macroeconomic data point toward a cooling Japanese economy.

This leaves the Bank of Japan in an increasingly difficult position. If inflation remains elevated while the yen continues to weaken, the pressure to raise interest rates will increase. But tighter monetary policy into a slowing economy risks putting an end to the current economic cycle.

And then there is Japan’s enormous debt burden. With one of the highest government debt-to-GDP ratios in the world, Japan is particularly sensitive to structurally higher interest rates. Rising yields gradually translate into higher refinancing costs as existing government debt matures and needs to be rolled over.

There is, however, an important difference compared with the US Treasury market: Japanese government bonds are predominantly held domestically, including by the Bank of Japan, domestic banks, insurers and pension funds. This reduces Japan’s dependence on foreign investors, but it does not eliminate the longer-term consequences of higher borrowing costs.

The situation remains fragile: Weak yen → higher import costs → higher inflation → pressure for higher rates → weaker economic growth.

There is also a potential global consequence that should not be underestimated. Japan remains one of the largest foreign holders of US Treasuries. To stabilize the Yen, Japan could continue to sell US Treasuries which leads to higher US yields. And, as Japanese government bond yields rise, domestic bonds become increasingly attractive to Japanese investors. This could reduce demand for US Treasuries or even encourage some capital to be repatriated back to Japan.

With the US Treasury market already facing enormous refinancing requirements and pressure on long-term yields, Japan is another important factor to keep on the radar.

Japan’s problems are therefore not necessarily isolated. Further stress in the yen and Japanese bond market could increasingly spill over into global fixed-income and overall financial markets.

Not to forget: the Japanese yen is a key funding currency for global carry trades. Any sharp appreciation could trigger a rapid unwinding of these positions, resulting in significant and sudden asset flows across global markets.

Become a member to access more valuable market updates like this