TOKYO — Japanese Prime Minister Sanae Takaichi announced a 3 trillion yen ($19 billion) supplementary budget on May 20, 2026, to help households cope with rising living costs. The move reverses her earlier stance that additional government spending was unnecessary.

Takaichi said the extra spending would be financed through deficit-covering bonds but maintained that total bond issuance for the 2026 calendar year would remain unchanged from the original budget plan. The announcement coincided with a rise in Japanese sovereign bond yields, with the 10-year yield reaching 2.809%—its highest level since 1996—and the 30-year yield climbing above 4%.

“You cannot increase spending without increasing debt,” said Jesper Koll, expert director at Tokyo-based financial services firm Monex Group. “If there ever is a red flag, that is a red flag,” he added. Koll criticized the government’s messaging, stating, “The first one, actually, people believe. The second one, nobody believes.” He said investors might have had more confidence if the government had announced a larger, fully bond-funded package upfront.

Koll also pointed to broader market signals, saying, “Bond markets are a lot of things, but they're not stupid.” He noted that inflation, Bank of Japan rate hikes, and increased bond supply were becoming “increasingly certain.”

In defense of the measure, Krishna Bhimavarapu, APAC economist at State Street Investment Management, described the budget as “less like broad stimulus and more like targeted cushioning for households facing energy-driven price pressures linked to the Iran conflict.” He added that the approach “keeps it consistent with Prime Minister Takaichi's philosophy rather than a large-scale demand boost.” State Street remains “structurally bullish on Japan, both on the economy and markets,” Bhimavarapu said.

Japan’s economy expanded at an annualized 2.1% pace in the first quarter, with real GDP rising 0.5% from the previous quarter. Exports rose 14.8% in April from a year earlier, helped by strong semiconductor shipments and AI-related demand. The Japanese yen remains near 160 versus the U.S. dollar, a level often regarded as a potential trigger for intervention.