160.00: Japanese Yen edges higher from key level as PM Takaichi warns of intervention

160.00 remains the key level for USD/JPY. The pair has retreated from two-week highs above that mark but is holding above 159.80.
Prime Minister Takaichi has issued an explicit intervention warning in response to Japanese Yen weakness.
Dovish BoJ remarks and a sharp rise in US yields have put the Yen under heavy pressure this week.

160.00 remains in focus on Friday. The Japanese Yen (JPY) is wavering just a few pips from that key level against the US Dollar (USD), under pressure from a sharp recovery in US Treasury yields. The weakness prompted an intervention warning from Japanese Prime Minister Sanae Takaichi earlier in the day.

This week’s decline in USD/JPY gathered pace as Federal Reserve (Fed) speakers signalled scope for an outsized December rate increase. US inflation figures published on Tuesday confirmed that price pressures continue to intensify, remaining well above the central bank’s 2% price-stability target.

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50-basis-point hike enters Fed debate

Earlier, elevated inflation led Fed Governor Christopher Waller to assert that “hiking only 25 basis points would put our credibility at risk”. Dallas Fed President Lorie Logan echoed that position a few days later, stating that “the FOMC needs to implement at least two more 25-basis-point rate increases.”

A half-point increase at the December 9 meeting now carries a 13.3% market-implied probability, up from 0% last week, according to CME’s FedWatch tool. The repricing has lifted the two-year government bond yield by 35 basis points this week. The benchmark 10-year yield has risen by 25 basis points, returning above 5%.

Higher US Treasury yields have driven broad US Dollar gains, putting the Japanese Yen under severe pressure. Dovish remarks from Bank of Japan (BoJ) official Taichiro Asada have added to the strain: on Thursday, he cautioned about the economic risks of increasing borrowing costs too quickly.

With the Yen under pressure, Japanese Prime Minister Sanae Takaichi said earlier on Friday that authorities in Tokyo are “closely monitoring markets” and that the government “will strive to preserve orderly forex markets,” signalling the Ministry of Finance’s readiness to intervene in support of the Yen. She also said she was in contact with US financial authorities. That raised the possibility of coordinated action similar to the intervention that lifted the JPY in late July.

Japanese Yen: Key FAQs

Japanese Yen: Main exchange-rate drivers

Among the world’s most actively traded currencies, the Japanese Yen (JPY) broadly reflects Japan’s economic performance. More specific influences include Bank of Japan policy, the gap between Japanese and US bond yields, and traders’ appetite for risk, alongside other factors.

Bank of Japan policy: Implications for the Yen

Currency control forms part of the Bank of Japan’s mandate, making its actions a major influence on the Yen. At times, the BoJ has intervened directly in foreign exchange markets, usually to weaken the currency. Political concerns among Japan’s principal trading partners, however, discourage frequent intervention. From 2013 to 2024, the BoJ’s ultra-loose monetary policy drove the Yen lower against its major peers as policy increasingly diverged from that of other leading central banks. The gradual withdrawal of that ultra-loose stance has more recently provided some support for the currency.

Japanese and US bond yields: The effect on the Yen

By maintaining ultra-loose monetary policy over the past decade, the BoJ widened its policy divergence from other central banks, most notably the US Federal Reserve. That helped expand the yield gap between 10-year US and Japanese bonds, supporting the US Dollar relative to the Japanese Yen. The gap is now narrowing following the BoJ’s 2024 decision to move gradually away from ultra-loose policy and interest-rate cuts by other major central banks.

Risk sentiment: The Yen’s safe-haven role

Investors often regard the Japanese Yen as a safe-haven asset. During market stress, its perceived reliability and stability make investors more likely to allocate funds to the currency. As a result, turbulent conditions are likely to lift the Yen against currencies considered riskier investments.