The yield on Japan’s benchmark 10-year government bond surpassed 3 percent on Wednesday, marking a threshold not seen in over 30 years. This development comes amid a broader global surge in bond yields, driven by persistent inflation concerns and geopolitical tensions affecting major economies.
The rise in Japanese government bond yields reflects mounting investor unease over a combination of factors. Among these are escalating government spending plans and ongoing pressure on the Bank of Japan (BOJ) to tighten monetary policy. Media reports indicated that various government departments and agencies have submitted record budget requests for the upcoming fiscal year, raising alarm about the country’s already elevated debt levels. Japan’s public debt remains notably high, with its net debt-to-GDP ratio exceeding 100 percent.
Contributing to the spike in bond yields was the sharp depreciation of the yen, despite a coordinated intervention in foreign exchange markets by the Bank of Japan and the US Treasury earlier this week. The yen’s decline has heightened expectations that the BOJ may accelerate interest rate hikes to stabilize the currency and counter inflationary pressures stemming from higher import costs.
Japan’s inflationary environment has shifted markedly, following years of deflation. Rising prices have been partly fueled by increased oil and gas costs linked to the renewed conflict in the Gulf region. The recent strikes exchanged between the United States and Iran, the first since July, have exacerbated concerns about energy supply disruptions. Japan, heavily reliant on energy imports through the Strait of Hormuz, is particularly vulnerable to such disruptions.
Scott Bessent, US Treasury secretary, expressed confidence that both the Japanese government and the Bank of Japan would take necessary measures to strengthen the yen. Analysts at Capital Economics also anticipate that the BOJ will quicken its tightening cycle to address inflation risks more decisively.
Meanwhile, Japanese Prime Minister Sanae Takaichi has proposed significant policy measures including a sharp increase in government spending and a cut to the consumption tax. These actions aim to stimulate household spending amid sluggish economic growth forecasts. According to the International Monetary Fund’s latest World Economic Outlook, Japan’s economy is expected to expand by 0.6 percent in 2026 and 0.7 percent in 2027, down from a 1.1 percent growth rate recorded in 2025.
The dollar strengthened modestly against the yen, reaching 160 yen per dollar, marking a gain of more than 2 percent year-to-date. Market participants remain attentive to Japan’s policy responses as the government and central bank navigate the twin challenges of inflation and fiscal sustainability amid global economic uncertainties.