Japan's core inflation breaches BoJ 2% target for first time in nine months, yen strengthens

Japan's currency edged higher following the inflation release, with the stronger-than-expected core-core CPI reading providing a measure of support within a USD/JPY band that has fluctuated between roughly 157 and 159 throughout much of October. A lasting drop in USD/JPY might require a signal from the Bank of Japan at its meeting next week, although a substantial trade deficit and a wide interest-rate differential with the United States continue to constrain gains for the yen. In the bond market, shorter-term maturities that are closely tied to pricing for a December rate increase remain the most vulnerable to a hawkish shift following a rally in Japanese government bonds in recent weeks. Oil remains a significant factor in the inflation trajectory, with crude prices above $110 a barrel pushing up import expenses, a development that is expected to prompt the BoJ to lift its inflation projections. Subsidies for electricity are continuing to suppress the core CPI number, hinting that genuine price pressures are stiffer than the 2.1% headline rate suggests.

Although inflation in Japan has climbed back over the BoJ's 2% threshold and is running higher beneath the surface, the government is holding back from announcing an official end to deflation, indicating that officials remain cautious.

• Japan's core CPI (which strips out fresh food) climbed 2.1% year-on-year in September, matching forecasts and quickening from 1.7% in August. This marks the first time the reading has exceeded the BoJ's 2% target since last December.
• Headline CPI also rose 2.1%, as economists had predicted, versus 1.9% previously.
• The core-core measure (which strips out both food and energy and is the closest counterpart to the US core measure) increased by 2.4%, beating a forecast of 2.3% and accelerating from 1.9%.
• Economy Minister Minoru Kiuchi stated that conditions are not yet sufficient for the government to formally declare the end of deflation.
• The BoJ is set to convene on October 29–30, where it is expected to maintain rates at 1.25% but might indicate that underlying price growth has essentially reached 2%.
• The yen strengthened in response to the data release.

The 2.1% rise in Japan's core consumer prices in September pushed the gauge above the BoJ's 2% target for the first time in nine months. At the same time, a stronger-than-expected rise in underlying prices bolstered the rationale for a further interest rate increase before the end of the year. The yen gained ground following the announcement.

The core CPI index, a measure that omits fresh food but encompasses energy, registered a 2.1% yearly gain in September, consistent with projections and a pickup from 1.7% in August. Meanwhile, the headline inflation rate also landed at 2.1%, as widely anticipated, compared with 1.9% the month prior. The figure that drew the most attention was the core-core inflation rate, a metric stripping out both food and energy and representing the Japanese statistic most comparable to the US core CPI. This reading advanced 2.4% year-on-year, outpacing the 2.3% forecast and climbing from 1.9% in the preceding month.

These results come on the heels of an even stiffer set of figures from Tokyo published earlier in the month. In the capital, core inflation climbed to 2.7% in September and the core-core reading reached 3.0%, driven in part by the expiration of certain government relief programs in the city. Across the country as a whole, electricity subsidies continue to keep household power costs in check, implying that the national core CPI figure masks some of the pricing momentum developing in the broader economy.

The fresh data reinforces the Bank of Japan's case for proceeding with rate increases. The BoJ raised its benchmark rate to 1.25% in September on a 7–2 vote, a decision that drew dissents from two members who maintained that inflation remained shy of the 2% goal. In the seven months leading up to August, core inflation had consistently printed below 2%. With the core and core-core indicators both having now surpassed the target, that dissenting position becomes harder to defend. This week, BoJ Governor Kazuo Ueda told parliament that underlying inflation is very close to the 2% goal.

Most analysts anticipate that the BoJ will leave rates unchanged at the October 29–30 gathering. Reuters, citing sources, indicated that the central bank could lift its inflation projections owing to sustained high oil prices and could communicate that underlying inflation has broadly attained the 2% level, thereby preserving the option of a rate rise in December.

The Japanese government adopted a notably more guarded stance. Economy Minister Minoru Kiuchi stated that the preconditions for officially declaring an end to deflation remain unfulfilled. A decision on that front, he elaborated, would consider the CPI, the GDP deflator, and the forces driving underlying price growth in order to guard against a relapse into sustained price falls. When questioned about reports that the BoJ might declare underlying inflation to have reached its target, Kiuchi expressed his hope that the central bank would steer its policy appropriately and consistent with the joint statement it shares with the government, which is aimed at achieving stable and sustainable price stability.

The disparity in tone carries significance. The Bank of Japan is growing more preoccupied with pinning inflation around the 2% level rather than stoking it. The government, on the other hand, continues to be cautious about prematurely claiming victory over deflation, despite prices currently increasing at a pace that exceeds the central bank's own threshold.

The focus now shifts to the BoJ's policy meeting scheduled for next week, along with the release of its quarterly outlook report. A definitive indication that underlying price growth has touched 2% would encourage financial markets to move further toward pricing in a rate increase for December. A more tentative communication, in contrast, would leave the yen reliant on the possibility of official intervention for its support.