Japan’s government backs faster BOJ rate hike to defend yen

Prime Minister Sanae Takaichi's government has signaled support for a near-term interest rate increase by the Bank of Japan, with September or October emerging as the most likely timing for the next move, according to a Bloomberg report published on Wednesday citing people familiar with the matter.bloomberg

The shift aligns the government's desire to reinforce the impact of recent US-Japan joint currency intervention with the BOJ's own concerns that yen weakness is driving up import prices and fueling inflation. Markets are now pricing in roughly a 74–76% probability of a rate hike at the BOJ's September 18 meeting, up from just 24% on July 30, according to Tokyo Tanshi data.wkzo+1

A Political Green Light

The report marks a notable evolution for Takaichi, whose pursuit of large-scale fiscal stimulus and dovish stance toward monetary policy had contributed to the yen's slide to multi-decade lows earlier this year. The prime minister's office said specific monetary policy tools should be left to the BOJ's judgment but added that the central bank should work closely with the government to achieve its 2% inflation target in a stable manner.bloomingbit

U.S. Treasury Secretary Scott Bessent had urged Japan to follow up joint intervention with "policy and fundamentals," interpreted as a nudge for rate normalization. "With political pressure weakening, there is a possibility that the Bank of Japan could accelerate the pace of its rate hikes," said Takahide Kiuchi, executive economist at Nomura Research Institute.wkzo

Intervention Backdrop

The coordinated yen-buying operation on July 30–31 — the first joint US-Japan intervention since 1998 — pulled the currency back from a 40-year low of 163.99 per dollar. The yen surged to as strong as 155.20 in the ensuing days but has since weakened back above 159.kfgo+1

Under a new arrangement, Japan can borrow dollars against its Treasury holdings using the U.S. FIMA repo facility. "FIMA is less a funding tool and more a deterrence tool, an almost bazooka-like backstop that forces markets to think twice before testing policymakers' resolve," said Masahiko Loo, senior fixed income strategist at State Street.wkzo

Stakes for September

Mizuho Securities ↗ 1.09% has moved up its base case for the next hike to September and raised its terminal rate forecast to 1.75% from 1.50%. MUFG Mitsubishi UFJ Financial Group, Inc. ↗ 1.00% analyst Lee Hardman noted that the Bloomberg report "fits with our own initial view that there was likely an agreement to allow the BOJ to continue to normalize policy in exchange for the US providing support for the yen through joint intervention."fxstreet+1

If the BOJ raises rates again in September or October, three hikes within 12 months would amount to Japan's fastest pace of monetary tightening since 1989. Failure to act, analysts warn, would carry its own risks. "Market players would lose faith in the BOJ's ability to continue on its rate hike path," said Rinto Maruyama, senior strategist at SMBC Nikko Securities. "In that case, the yen would fall and longer-term bond yields would climb as inflation fears mount."wkzo+1