Japan’s Finance Minister Satsuki Katayama is set to attend next week’s G20 finance leaders’ meeting in Asheville, North Carolina, putting the battered Japanese yen and Tokyo’s increasingly close currency coordination with Washington back under the international spotlight.
Katayama said Friday that she plans to participate in discussions on the global economy and international financial conditions. The meeting comes at a particularly sensitive moment for Japan after the United States and Japan carried out a rare coordinated intervention last month to support the yen.
The bigger question for markets now is not simply whether Katayama will attend.
It is whether she will meet U.S. Treasury Secretary Scott Bessent—and what, if anything, the two sides will say about the yen.
The Yen Has Already Been Rescued Once
The yen came under extraordinary pressure in July, with the dollar climbing close to ¥164, a roughly four-decade high.
Japan and the United States subsequently coordinated action to purchase yen, marking an unusually direct intervention by Washington in support of Japan’s currency. The move initially pushed the dollar down sharply against the yen, with the currency briefly strengthening to around ¥155.20 per dollar.
But the gains have not held.
By Friday, the yen was trading around ¥155.41 per dollar in Reuters’ report, substantially stronger than its July low but again showing signs of vulnerability.
That reversal is precisely why investors are watching the G20 so closely.
Any fresh comments from Japanese or U.S. officials could influence expectations about whether another intervention might eventually be required.
Washington and Tokyo Have Already Sent a Warning
The July intervention was significant because it demonstrated that Washington was willing to work directly with Tokyo to address what both governments regarded as excessive currency volatility.
U.S. Treasury Secretary Scott Bessent has previously indicated that Washington would not rule out another coordinated intervention. Japan has likewise maintained that it is prepared to respond if excessive or disorderly currency movements return.
The unusual cooperation has attracted considerable attention because currency intervention of this nature is relatively rare.
CNA reported that the July action was the first coordinated U.S.-Japan intervention since 2011, while Reuters noted that the operation represented a significant escalation in efforts to halt the yen’s slide.
But Intervention Alone May Not Fix the Yen
The underlying problem remains.
Japan’s interest rates are still considerably below those in the United States, making dollar-denominated assets relatively attractive and limiting the ability of currency intervention alone to produce a lasting change in the yen’s trajectory.
The Bank of Japan currently has its policy rate at 1%, after raising it in June to the highest level in decades. At the same time, inflationary pressures have remained significant.
That has intensified speculation that the BOJ could raise rates again at its September 17–18 policy meeting.
Reuters reported that a majority of economists surveyed expect the BOJ to raise its policy rate to 1.25% from 1% in September.
The market is therefore watching two separate but interconnected questions:
Will Japan intervene again if the yen weakens sharply?
And:
Will the BOJ raise interest rates to address the economic forces contributing to that weakness?
BOJ Governor Ueda Adds Another Layer of Suspense
Bank of Japan Governor Kazuo Ueda is another major focus of the upcoming G20 gathering.
Ueda skipped this week’s Jackson Hole central-bank symposium because of scheduling conflicts, shifting market attention toward the possibility of his appearance at the G20 meeting in Asheville.
Bessent has previously said he looked forward to meeting Ueda there, although the BOJ has not officially confirmed that Ueda will attend.
That uncertainty has made the G20 potentially important for currency and bond markets.
Investors will be listening for any indication that Japan’s monetary authorities are becoming more comfortable with another rate increase.
Inflation Is Making the BOJ’s Decision Harder
Japan’s inflation picture is also becoming increasingly difficult for policymakers to ignore.
Tokyo’s core inflation accelerated to 1.8% in August, its third consecutive monthly increase, while a measure excluding fresh food and fuel reached 2%. The data reinforced expectations that the BOJ may need to continue tightening monetary policy.
The problem for Japan is that higher interest rates can support the yen but also increase borrowing costs for businesses, households and the heavily indebted government.
Meanwhile, Japan’s long-term bond yields have also risen sharply. Reuters recently reported that the 10-year Japanese government bond yield approached 3%, reflecting a broader increase in concerns about inflation and government financing costs.
The G20 Could Become a Test of the Yen Strategy
For markets, the Asheville meeting could therefore become an important test of Japan’s new approach.
Tokyo has already demonstrated that it is willing to intervene. Washington has demonstrated that it is willing to participate.
But the yen’s subsequent weakness suggests that intervention has not eliminated the fundamental pressures weighing on the currency.
Reuters Breakingviews recently argued that the U.S.-Japan intervention may actually complicate the BOJ’s policy dilemma by increasing pressure for closer coordination between fiscal, currency and monetary policy.
Former Japanese currency official Naoyuki Shinohara has also compared the recent episode with elements of the financial stress seen during the Asian financial crisis, while stressing that Japan is not currently experiencing a crisis on the scale of 1990s Thailand.
What Markets Will Be Watching
The G20 meeting could therefore generate several market-moving signals:
- A Katayama-Bessent meeting and any discussion of exchange rates.
- Comments from Ueda about inflation and future BOJ policy.
- Any suggestion that another yen intervention remains on the table.
- Signals regarding the timing of a potential September BOJ rate hike.
- Discussions surrounding global financial stability and bond-market volatility.
The stakes extend beyond Japan.
A sharp move in the yen can affect global carry trades, Japanese government bonds, U.S. Treasury markets and other Asian currencies. The July intervention itself was closely watched because of concerns that disorderly yen weakness could spill into broader financial markets.
The Bottom Line
Japan is arriving at the G20 with a problem that has become impossible for global markets to ignore.
The government has already shown that it can intervene.
The United States has shown that it is willing to help.
The Bank of Japan is facing growing pressure to raise interest rates.
Yet the yen remains vulnerable.
That leaves investors with one crucial question heading into Asheville:
If the yen starts falling sharply again, will Japan and the United States be willing to intervene a second time—or will Tokyo ultimately have to rely on higher interest rates to defend its currency?
The answer could determine not only the yen’s next major move, but also how global markets interpret the increasingly unusual U.S.-Japan economic partnership.
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