Japan’s benchmark borrowing costs climbed to their highest level in 30 years on Tuesday, as U.S. Treasury Secretary Scott Bessent stepped up pressure on Tokyo to address the yen’s slide.
The 10-year Japanese government bond yield rose 6 basis points to nudge above 3% — a level not seen since 1996. The move came as global bond markets were under pressure, with U.S. Treasury yields broadly higher after a speech by Federal Reserve Chair Kevin Warsh was read by markets as hawkish. Bond yields move inversely to prices.
The yen was last trading at 160.1 per dollar, breaching the 160 level for a third straight session — a threshold that traders see as increasing the odds of currency intervention. The U.S. and Japan conducted a rare joint intervention in late July to support the yen, but the currency has since given back much of those gains.
Bessent’s message
In a Monday interview with CNBC, Bessent said: “I have information that the market doesn’t have. And it’s my belief that the Japanese government and that the BOJ will do the things that will lead to a stronger yen.”
A U.S. official told Japanese broadcaster NHK that Bessent, in separate meetings with Japanese Finance Minister Satsuki Katayama and Bank of Japan Governor Kazuo Ueda, emphasized the need for Japan to communicate its path toward fiscal sustainability and further rate hikes.

Katayama told reporters that the U.S. and Japan agreed to continue coordinating efforts to achieve “orderly” moves in the yen and remained ready to respond to “disorderly” market moves, according to Reuters.
Why it matters
The years-long depreciation of the yen has become a growing concern for Tokyo due to its impact on consumer prices through higher import costs. Washington is also watching closely, analysts say, because Japan — the largest foreign holder of U.S. government debt — could fund an intervention by selling Treasurys at a time when long-term borrowing costs are already elevated. Major moves in Japan’s market could also ripple through global markets and potentially weaken the dollar.
Tuesday’s rise in Japanese yields reflects increased market expectations of a Bank of Japan rate hike in September, and possibly an adjustment of the terminal rate from 1.5% to 1.75% or higher, Takuji Okubo, managing director at Japan Macro Advisors, told CNBC.
The terminal rate is the peak level a central bank is expected to reach in its current tightening cycle. Japan’s benchmark rate currently stands at 1%.
The move also comes as government borrowing costs hit multi-decade highs across the world, with the resumption of military hostilities between the U.S. and Iran over the weekend reigniting inflation concerns.
Okubo said a 3% 10-year yield “is high in historical perspective, but it just means another step for Japan in leaving deflation in the past and joining the rest of the world where 2% inflation is an achievable normal.”
Source: www.cnbc.com — https://www.cnbc.com/2026/09/01/japan-bonds-yen-intervention-bessent.html
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