A pivotal meeting between US Treasury Secretary Scott Bessent and Bank of Japan Governor Kazuo Ueda on the sidelines of the G20 summit has emerged as a major focal point for global currency and interest rate markets. The central question for investors is whether the two officials can forge a public consensus that the yen is undervalued and that the BOJ needs to hasten its pace of monetary tightening, potentially drawing a line under the country's long-standing reflation experiment.

According to a research note from Nomura Securities analyst Naka Matsuzawa, Bessent adopted an unusually direct tone in a recent Reuters interview ahead of the talks, stating, "I think Abenomics — a reflation program — may be at its end," while expressing confidence that the BOJ will "do the right thing" regarding monetary policy. This marks the most explicit public statement from Bessent to date, a notable escalation from his previously veiled hints on the subject.

Market expectations for a BOJ rate hike at its September 18 meeting continue to build. Nomura notes that markets currently price in a 68% probability of a move before the September FOMC. Meanwhile, the five-year forward OIS rate, a proxy for the neutral rate on Japanese 10-year government bonds, has climbed to 2.97%, approaching the critical 3% threshold — a level rarely seen in decades.

Against this backdrop, both Japanese equities and bonds are under pressure. Banking stocks are hovering near cycle highs due to the benefits of rising rates, but nearly all other domestic-demand sectors remain persistently weak, indicating that tightening expectations are already exerting real pressure on the economy. In the currency market, USD/JPY is trading in the 159.5-160 range, with the effects of record-breaking intervention having largely faded.

A Clearer Stance from Washington: Urging Japan to Move Beyond Reflation

Bessent's remarks to Reuters represent the public crystallization of his long-held position. Over the past year, he has repeatedly hinted — in subtle ways — that he prefers BOJ rate hikes as the fundamental solution to support the yen, rather than repeated intervention by Japan's Ministry of Finance. His direct language at the G20 signifies a shift in US pressure: from coordinated market operations to open endorsement at the policy level.

In an interview with CNBC, Bessent elaborated, "I can't affect the natural equilibrium exchange rate. What we can do is send a signal. I have information that the market doesn't have, and I trust that the Japanese government and the BOJ will take actions that will help the yen strengthen." He added that "the market is already pricing in the hike expectation." In his Reuters interview, he also noted that recent yen moves have been "fairly orderly," contrasting with the "disorderly" conditions that previously triggered intervention.

Markets have interpreted these statements as a unified signal: Washington wants the BOJ to replace currency intervention with policy action, structurally addressing the yen's undervaluation.

Ueda's Role: Not the Official Counterpart, But a Voice of Weight

Bessent's official counterpart is Japan's Finance Minister Katsunobu Kato, but market attention is squarely focused on his private discussions with BOJ Governor Ueda. According to Matsuzawa, while Ueda is not Bessent's formal counterpart, the two have known each other for years, and Bessent holds significant confidence in Ueda as a policymaker. Following previous currency interventions, Bessent publicly expressed his anticipation of meeting with Ueda.

The key is whether Ueda can establish a clear mutual understanding with Bessent on the yen's undervaluation and the need for accelerated BOJ rate hikes, and then transmit that signal to the market in some form. However, Matsuzawa also cautioned that it remains unclear how much of the meeting's substance will be disclosed via press conferences or media channels.

Hank Calenti, chief global markets strategist at SMBC EMEA, commented, "The key is the narrative, and how hawkish the governor's language is." He noted that subtle shifts in Ueda's subsequent public statements could directly reshape the yield curve's trajectory.

Intervention's Diminishing Returns: Rate Hikes Emerge as the Only Solution

Japan's Ministry of Finance revealed last Friday that monthly intervention in the foreign exchange market reached 15.4 trillion yen (approximately $96.4 billion), a historical record. Yet, July's experience has thoroughly exposed the limits of intervention: coordinated buying briefly pushed USD/JPY back to the 155 level, but within a month, the pair was once again approaching 160. Markets keep reverting to the same logic: powerful carry-trade dynamics, low volatility, and Japanese monetary policy still lagging behind the curve.

The scale of US participation in intervention is expected to be far smaller than Japan's, and Bessent himself admits he cannot influence the currency's "natural equilibrium." In this context, market consensus is increasingly clear: without substantive monetary tightening, pure currency intervention will not produce lasting effects.

Neutral Rate Approaching 3%: Japan's Bond Market Faces Structural Repricing

In his report, Nomura's Matsuzawa highlighted that market expectations for the neutral level of 10-year Japanese yields, as measured by the 5-year forward OIS rate, have risen to 2.97%. This level exceeds the sum of Japan's 5-year inflation expectations (break-even inflation rate of 2.3% to 2.4%) and the BOJ's estimated real neutral rate range (-0.9% to +0.5%), which cannot be fully explained by domestic factors alone.

Matsuzawa points out that Japanese yields rising in tandem with US yields is a key driver widening this gap. Currently, momentum is building both in US markets and within the Federal Reserve to revise neutral rate expectations higher, which continues to pull Japanese long-end yields upward. Until the US long-end yield upswing runs its course, investor demand for long-term JGBs is unlikely to improve materially.

Nevertheless, potential support exists beneath the surface. According to Bloomberg, a major life insurance company indicated in an interview last week that a 10-year JGB yield of 3.0% would offer good investment value, and at that level, it might revise its plans and re-accumulate Japanese government bonds. Since life insurers are primarily active in the super-long end, Thursday's 30-year bond auction may be more indicative than today's 10-year sale. Matsuzawa warned that if demand at the 10-year auction remains weak, insurers may adopt a wait-and-see stance, and demand for 30-year bonds would also struggle to gain traction.