Global Market: Yen weakness puts BOJ under pressure for faster monetary tightening

The United States is pushing Japan towards a tougher monetary and fiscal policy stance after a rare joint intervention by Washington and Tokyo to support the yen, with U.S. Treasury Secretary Scott Bessent signaling that further action may depend on Japan addressing the underlying causes of the currency's weakness.

A month after the joint intervention, Bessent indicated that the recent movements in the yen did not warrant another market operation. Instead, he called for the Bank of Japan (BOJ) to respond through higher interest rates as inflationary pressures continue to build, according to a report by Reuters.

Also Read | Global Market: Japan stocks see sector rotation as tech shares tumble


BOJ faces pressure to move faster
The BOJ is already widely expected to raise interest rates in September as rising prices put pressure on policymakers. However, Bessent's latest comments increase the pressure on Governor Kazuo Ueda to not only deliver the expected hike but also signal a faster pace of monetary tightening.

The report stated that Bessent met Ueda on Sunday during the G20 finance leaders' meeting in Asheville, North Carolina. A U.S. Treasury official also told Japanese broadcaster NHK that the need for further rate hikes was discussed.

The yen's weakness has contributed to higher import costs and broader inflation, adding to the financial burden on Japanese households. At the same time, persistently low Japanese interest rates have limited the currency's appeal and widened concerns over further depreciation.

Yen weakness raises wider market risks
The pressure on Japan extends beyond the currency market. A prolonged period of slow BOJ tightening combined with expansionary fiscal policy could trigger further selling in the yen and Japanese government bonds, potentially creating broader disruptions across global financial markets.

According to the report, a sharp rise in Japanese bond yields could also spill over into U.S. Treasury markets, making developments in Japan an issue for Washington as well.

Markets are therefore closely watching Ueda's comments following the G20 meeting for clues about the timing and pace of future rate increases.

Inflation may force quicker tightening
Even without pressure from Washington, the BOJ's recent communications have suggested that policymakers are becoming increasingly concerned about persistent inflation.

Rising producer prices could feed into consumer inflation, strengthening the case for further monetary tightening. With a September rate increase already largely priced in by markets, investors may now look for indications that additional hikes could follow relatively quickly.

The report also stated that Oxford Economics now expects the BOJ to raise rates in September and December this year, followed by another increase in April 2027. That would represent a faster tightening cycle than previously anticipated.

The growing expectation of more aggressive action reflects the economic and political costs of disappointing both financial markets and the United States, according to analysts cited by Reuters.

US signals shift away from Abenomics
Bessent's message also extends beyond monetary policy. His criticism of Japan's continued reliance on large-scale fiscal stimulus represents a challenge to the government's expansionary economic approach.

According to Reuters, Bessent argued that Japan had already achieved the primary objective of Abenomics — ending prolonged deflation — and should now move away from the extraordinary policy measures associated with it.

The comments are particularly significant for Prime Minister Sanae Takaichi, who has backed an ambitious spending programme designed to encourage investment in strategic growth sectors while providing support to households facing higher living costs.

Fiscal expansion adds to bond-market concerns
Takaichi's government has moved toward greater public spending, including plans to remove spending limits in key growth areas. Domestic media reports cited by Reuters indicated that ministries and government agencies were preparing what could be a record level of initial budget requests for the next fiscal year.

That expansionary approach has unsettled investors, contributing to a sharp rise in Japanese government bond yields.

Higher borrowing costs could complicate the government's fiscal plans while also increasing volatility in global bond markets. The possibility of Japanese capital moving away from overseas assets and the potential impact on U.S. Treasury yields make Japan's fiscal direction increasingly important for Washington.

Japan faces a delicate policy balancing act
The BOJ and the Japanese government are now facing pressure on two fronts: controlling inflation and stabilising the yen while avoiding an abrupt tightening that could undermine economic growth.

A faster pace of rate increases could provide greater support for the yen and help contain imported inflation, but it would also raise borrowing costs for businesses and households. Meanwhile, continued fiscal expansion could provide economic support but risks placing additional pressure on government bond yields.

Policymakers are also under growing pressure to deliver a clearer commitment to both monetary normalisation and fiscal discipline.

The developments mark a significant shift in Japan's policy environment. After years of ultra-loose monetary policy and aggressive fiscal support, pressure from markets and Washington is increasingly pushing Tokyo toward a more conventional policy framework.