Japan Services Producer Prices Rise 3.7% in August, BOJ Says

Japan’s services producer prices rose 3.7% in August from a year earlier, accelerating slightly from a 3.6% annual increase in July, according to Bank of Japan data released Monday. The index, which tracks the prices businesses charge other businesses and government bodies for services, stood at 115.4 on a 2020 base, up from 115.1 in July and 0.3% higher on the month.

The August reading kept service-sector producer inflation at a relatively firm pace after several months above 3%, suggesting cost pressure in business-to-business services has not eased much even as some individual categories cooled. A measure that strips out international transportation, one of the more volatile parts of the series, rose 3.2% from a year earlier, matching the pace indicated for July.

That matters because the services producer price index, or SPPI, gives a different view of inflation from the consumer price indexes that tend to draw more public attention. Instead of retail prices paid by households, the BOJ’s series captures prices for services supplied to firms and public-sector buyers. It is one of the indicators the central bank uses to assess domestic price conditions and how cost trends are moving through the economy.

August reading edges above July

In its monthly report on the services producer price index for August 2026, the BOJ said the all-items index rose 3.7% from a year earlier, compared with 3.6% in July. On a month-to-month basis, the all-items index increased 0.3% after a 0.4% monthly rise in July. That left the level of the headline index at its highest this year, slightly above the 115.0 readings recorded in April and May.

The release also showed that underlying price pressure looked steadier than the headline change alone might suggest. Excluding international transportation, the all-items index rose 3.2% year over year in August, the same pace as the revised July reading, while the monthly gain was 0.2%. That distinction is useful because shipping and other internationally influenced transport categories can swing sharply and sometimes mask what is happening in more domestically oriented services.

Monday’s publication carried an extra layer of technical significance because it coincided with the BOJ’s scheduled annual retroactive revision for the series. In a separate notice, the central bank said some figures from January 2025 onward were revised in line with the SPPI’s regular revision policy. That does not change the August headline result, but it is a reminder that the monthly numbers are preliminary and can be adjusted as more complete information becomes available.

Transport prices and leasing still shape the picture

The strongest upward pressure continued to come from transportation-related services. The major group covering transportation and postal activities rose 6.8% from a year earlier in August, up from 6.4% in July. Within that broad group, ocean freight transportation jumped 74.2% from a year earlier, up from 67.4% in July, while road freight transportation was up 4.3% and domestic air passenger transportation rose 5.2%.

Some of those transport figures point to the uneven composition of current service inflation. International air freight transportation was still up 32.0% from a year earlier, but that marked a slowdown from 37.7% in July. Travel arrangement services also cooled to a 1.4% annual gain from 3.0% the month before. Even so, the overall transportation and postal category remained one of the largest contributors to the all-items increase because of both its size in the index and the continued strength of several freight-related components.

Outside transport, leasing and rental services were another area of notable strength. The leasing subgroup rose 21.1% from a year earlier, up from 19.7% in July, while rental services rose 1.2%. The BOJ’s summary of monthly changes also highlighted gains in advertising-related services and in some professional-service categories, including civil engineering and architectural services.

Not every major area strengthened in August. Information and communications rose 2.5% from a year earlier, slower than the revised 2.9% pace in July. Software development, one of the larger components in that group, slowed to 2.5% annual growth from 3.4%. The BOJ’s change summary also showed hotels easing sharply, with annual growth slowing to 1.6% from 6.3% in July. Those pockets of moderation help explain why the overall acceleration in the headline index was modest rather than broad based.

Why the SPPI matters for the BOJ

The BOJ’s own description of the index shows why the series receives close attention. The SPPI covers service products provided by businesses to other businesses and to central and local governments in Japan. It does not aim to measure prices paid only by consumers. The central bank says the index is used to capture supply and demand conditions for service products, help assess economic and price conditions, and serve as a deflator for calculating real values from nominal figures.

For policy watchers, a service-price gauge holding above 3% is notable because services inflation is often tied more closely to domestic demand, labor costs and pricing power than to the swings in imported commodity prices that can drive goods inflation. At the same time, the August report does not on its own establish a direct pipeline into consumer inflation or a specific monetary-policy decision. It is better read as one piece of a broader inflation picture that the BOJ will weigh alongside consumer prices, wages, business sentiment and activity data.

The ex-international-transport measure may be especially useful in that broader reading. With that gauge at 3.2% year over year in August, unchanged from July, domestic service-price pressure appears elevated but not obviously accelerating in a decisive way. In other words, the latest data point supports the view that cost pressure in services remains firm, while also showing that some of the strongest movements are still concentrated in categories such as freight and leasing rather than spread evenly across the full service economy.

The BOJ notes in its methodology that monthly SPPI figures are preliminary and can be revised over the following three months as additional information arrives. For that reason, analysts and readers will want to watch not just the next monthly release, but also how the current readings hold up after revisions. In the near term, the central bank is due to publish its quarterly Tankan business survey on Oct. 1, offering another closely watched snapshot of corporate conditions after the August service-price report.