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Japan’s rising bond yields, weaker yen and heavy public debt are reshaping global financial risks. For Muslim investors, the lesson is to diversify carefully across countries, currencies and a range of Shariah-compliant asset classes.
By MOGAMAT ALI SALIE
For decades, Japan was one of the countries financing America. Today, financial stress in Japan is being watched closely in Washington and across global markets.
That change should make the world pay attention.
Japan is not an emerging economy running out of dollars. It is one of the world’s largest economies, a major creditor nation and an important pillar of the international financial system. Yet it also carries one of the world’s heaviest public-debt burdens.
The International Monetary Fund projects Japan’s general-government gross debt at approximately 204.4% of GDP in 2026.
For years, this system appeared sustainable because borrowing costs were exceptionally low. That equation is changing.
Japanese government-bond yields have risen sharply from the ultra-low levels that defined much of the previous era. On September 1, 2026, the benchmark ten-year Japanese government-bond yield reached approximately 3%, its highest level since 1996. Longer-term bond yields also climbed significantly.
Higher yields matter because they increase the cost of borrowing and can place pressure on a government that has accumulated debt over several decades. The impact is not immediate across the entire debt stock, since much depends on the maturity and refinancing structure of government bonds.
Nevertheless, a prolonged rise in interest rates could gradually increase debt-servicing costs.
Japan’s currency presents another challenge. A weaker yen raises the domestic-currency cost of imported energy, food and raw materials. The Bank of Japan has identified exchange-rate movements and higher commodity prices as contributors to rising import prices. It has also warned that inflation may remain above its 2% target during part of fiscal 2026.
This leaves the Bank of Japan facing a difficult policy trade-off. Higher interest rates could support the yen and help contain inflation, but they would also increase borrowing costs across the economy. Maintaining a more accommodative policy could provide relief to borrowers, while risking further currency weakness and imported inflation.
Japan’s difficulties matter beyond its borders because the country is a major international investor. Japan held approximately US$1.116 trillion in US Treasury securities in June 2026, making it the largest foreign holder of US government debt at that time. At the end of 2025, Japan’s net international investment position stood at approximately ¥561.8 trillion.
If Japanese investors were to reduce their foreign-asset exposure and repatriate a significant share of the proceeds, the resulting portfolio shifts could affect exchange rates and global bond markets. This does not mean that Japan is preparing to sell US Treasuries, nor does it establish that Washington is intervening to prevent such sales.
The International Monetary Fund’s April 2026 Global Financial Stability Report nevertheless warned that sharp and volatile increases in Japanese government-bond yields could encourage asset-allocation shifts by Japanese and foreign investors, creating possible spillovers beyond Japan.
The United States has historically been reluctant to intervene directly in foreign-exchange markets. The most recent clearly documented US intervention to support the yen took place on June 17, 1998, when US monetary authorities sold approximately US$833 million for yen in cooperation with Japanese authorities.
In March 2011, the United States, the United Kingdom, Canada and the European Central Bank joined Japan in coordinated intervention to counter excessive yen appreciation after the earthquake and tsunami. These episodes illustrate how unusual direct intervention has been and why it is generally associated with exceptional market conditions or coordinated international action.
For Muslim investors, Japan’s experience raises a broader question about the risks embedded in a debt-based financial system.
Islamic finance generally prohibits riba and emphasises transactions connected to assets, trade, ownership, leasing and the sharing or bearing of commercial risk. It challenges the assumption that money should automatically generate more money merely through the passage of time.
This does not mean that Shariah-compliant investments are immune from market shocks. Equities can fall, sukuk prices can decline, property values can weaken and currencies can lose value. Shariah compliance does not eliminate investment risk.
It does, however, encourage investors to examine leverage, ownership, economic purpose and the distribution of risk more carefully.
For South African Muslim families, the lesson is therefore larger than Japan. Diversification should extend across countries, currencies, asset classes and sources of economic risk. Global Shariah-compliant equities, sukuk, property, precious metals and productive private-market investments may each serve different purposes in a properly constructed portfolio.
Japan’s circumstances are not proof that the global financial system is collapsing. They are a warning that the era of exceptionally cheap money has consequences.
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When a major creditor nation faces rising yields, currency weakness and a heavy public-debt burden, investors should recognise that the financial order is changing. Those who understand these pressures early may be better prepared for what comes next.
Mogamat Ali Salie is the co-founder and Advisory Partner with the MuslimFin Family Office.
