The yield on Japan's benchmark 10-year government bond briefly touched 2.9 percent in Tokyo trading on Thursday, a threshold last crossed in November 1996. The move extended a sell-off that has pushed long-term rates to roughly 30-year highs, tracking a rise in US Treasury yields but also reflecting a sharp domestic reappraisal of fiscal and monetary policy direction.

The immediate trigger was the draft of the government's annual economic and fiscal guidelines, nicknamed the "honebuto" plan. Released in late June under Prime Minister Sanae Takaichi, the text emphasised proactive fiscal expansion and described appropriate monetary easing as "extremely important" for a strong economy. Market participants in Tokyo read the language as an attempt to discourage the Bank of Japan from raising its policy rate further, even after the central bank lifted it to 1 percent last month. The draft also omitted references to fiscal consolidation that had appeared in previous years. The resulting "honebuto shock" ignited a bond sell-off, compounded by inflation fears tied to rising crude oil prices as US-Iran tensions escalated. The BOJ's own quarterly report, released the same day, noted that companies are passing on higher energy and raw-material costs to consumers faster than in the past, with food and daily necessities prices set to rise from the summer.

Government officials moved to contain the damage. Economic and fiscal policy minister Minoru Kiuchi told reporters that the market had misinterpreted the draft, insisting the government was not encouraging lower interest rates. A revised version presented to the ruling coalition added a phrase about monetary policy "contributing to achieving stable price increases." Yet the climb in yields continued, and the yen remained pinned near 162 to the dollar. Analysts in London point to a breakdown in the usual correlation between yields and the currency: as yields have risen steeply over the past 18 months, the yen has kept falling, a pattern more commonly associated with vulnerable emerging markets. The squeeze is also reaching households; a survey by research firm Intage showed the average summer holiday budget rose for the first time in three years, but respondents attributed the increase to high prices and a weak yen rather than greater spending power.

The next milestones are the finalisation of the government's economic guidelines and the BOJ's upcoming policy meeting. Market attention is fixed on whether Tokyo can restore confidence in its fiscal management and whether the central bank will proceed with further rate increases despite political headwinds.