New Warning Signs in Japan Spark Investor Anxiety

Japan’s bond market is facing significant pressure following a surge in government bond yields to their highest level in four decades. This has been triggered by investor concerns over Japan’s additional budget plan worth 3 trillion yen, approximately $19 billion (Rp338.54 trillion, based on an exchange rate of Rp17,818 per US dollar), which Prime Minister Sanae Takaichi is preparing to assist households facing rising living costs due to energy price hikes stemming from the Iran conflict. The funds will be used to bolster fiscal reserves and finance fuel and utility subsidies. However, the move has sparked market scepticism regarding the government’s pledge not to increase total bond issuance through 2026. Notably, Japan’s 10-year government bond yield rose to 2.809% on 20 May, the highest since 1996, while the 30-year yield breached 4%, reflecting investor concerns over fiscal risks and rising inflation pressures. “The bond market is complex, but it is not naive,” said Jesper Koll, Head of Research at Monex Group, in a CNBC International report on Monday, 1 June 2026. “You cannot increase spending without raising debt,” he added. Concerns have also arisen after Takaichi referenced the calendar year 2026 when outlining bond issuance targets. Analysts note this is unusual, as Japan traditionally uses a fiscal year ending on 31 March. “No one in Japan has ever formulated policy based on the calendar year,” Koll said. “If there are warning signs, they are clear,” he added. Louis Chua, Asia equity research analyst at Julius Baer, echoed these concerns. Geopolitical uncertainty in the Middle East, elevated commodity prices, and rising energy subsidy burdens have further worsened market sentiment towards Japan’s fiscal position. “Recent developments—including ongoing Middle East uncertainty, high commodity prices, and increased fuel subsidy spending—have contributed to bond market concerns about Japan’s fiscal position this year,” he stressed. However, not all analysts view the package as disruptive. Krishna Bhimavarapu, APAC economist at State Street Investment Management, said the government’s move aligns with Takaichi’s cautious fiscal approach. “We remain structurally optimistic about Japan’s economy and markets,” he said. “The additional budget appears less like broad stimulus and more like targeted support for households facing energy-driven price pressures linked to the Iran conflict,” he added. “This aligns with Prime Minister Takaichi’s philosophy rather than large-scale demand stimulus.” Recent data shows Japan’s economy improving. It grew at an annualised rate of 2.1% in the first quarter (Q1), with real GDP rising 0.5% from the previous quarter. Exports rose 14.8% year-on-year in April, supported by strong semiconductor shipments and AI-related demand. However, investors are now focused on inflation risks, potential central bank interest rate hikes by the Bank of Japan (BOJ), and the possibility of increased bond supply that could further pressure Japan’s debt market.