Japan CPI September 2026

Japan’s Consumer Price Index (CPI) for August 2026 is scheduled for release on September 18, 2026 at 8:30 am Japan Standard Time, which is 7:30 pm ET on September 17 and 12:30 am London time on September 18. The figures are published by the Statistics Bureau of Japan and cover price changes for August 2026 compared with a year earlier. Full schedule and background: Japan CPI.

What is Japan CPI?

The Consumer Price Index tracks the average change in prices paid by households for a fixed basket of goods and services, from rice and electricity to rent and rail fares. It is the country’s main measure of inflation and is compiled monthly by the Statistics Bureau of Japan, part of the Ministry of Internal Affairs and Communications.

Three versions of the index matter most to markets. The headline figure includes everything. “Core CPI” strips out fresh food, which swings with weather and harvests, to give a cleaner read on underlying price trends. A further measure, sometimes called “core-core” CPI, also excludes energy, isolating price pressure that has little to do with volatile oil and gas costs. The Bank of Japan (BOJ) watches the core (ex fresh food) figure most closely when setting interest rates.

Investors, currency traders and the BOJ itself use the release to judge whether inflation is settling near the central bank’s 2% target on a durable basis, or whether it is being driven by temporary factors such as import costs or subsidy changes. Because Japan spent decades battling deflation, sustained inflation above target is treated as a genuinely significant shift, not routine noise.

When is the August Japan CPI released?

The Statistics Bureau of Japan will publish the August 2026 CPI report on Friday, September 18, 2026, at 8:30 am local time. The data appears on the bureau’s official website. For readers outside Japan, that is 7:30 pm Eastern Time the previous evening (September 17) and 12:30 am in London on September 18, so European and American markets react to the numbers overnight or first thing the next morning depending on their time zone.

What is the consensus forecast?

A consensus forecast for the August 2026 report has not yet been published. Economist surveys from Reuters and Bloomberg typically appear only in the days immediately before release. The most recent published data is for July 2026, when the Statistics Bureau reported headline CPI at 1.9% year-on-year and core CPI (ex fresh food) at 1.8% year-on-year, both up from June, according to Investing.com. The core-core measure, which excludes fresh food and energy, rose to 1.9% year-on-year in July, according to Trading Economics.

What the result could mean

These are possible market reactions based on how similar releases have been discussed by analysts, not predictions of what will happen in September.

Why does this release matter right now?

Japanese inflation has been gradually accelerating through 2026. Core CPI eased to around 1.6% in the spring before picking up to 1.8% in July, according to data reported by FX.co. Trading Economics attributed part of the July acceleration to higher energy, food, and household goods costs, with government fuel subsidies gradually being scaled back and geopolitical tensions in the Middle East adding pressure to import costs.

The Bank of Japan raised its policy rate by 25 basis points (a basis point is one-hundredth of a percentage point) in June 2026 to its highest level since 1995, according to Trading Economics, its first hike since the previous December. Inflation remaining close to, but still below, the BOJ’s 2% target keeps the central bank in a delicate position: too little inflation risks a return to the deflationary pressures Japan battled for decades, while too much risks squeezing households and businesses that have grown used to low borrowing costs.

What It Means for Your Money

Mortgages and borrowing: most Japanese mortgages are variable rate, so a BOJ that keeps raising interest rates in response to persistent inflation could gradually push up monthly repayments for homeowners in Japan.

Savings: higher policy rates tend to filter through slowly to Japanese savings accounts, which have offered near-zero returns for years, so any further tightening could finally bring modestly better returns for savers.

Jobs and wages: sustained inflation increases pressure on Japanese employers to raise wages to keep pace with living costs, a dynamic the BOJ is watching closely as a sign that inflation is becoming self-sustaining rather than temporary.

Prices: higher CPI readings mean everyday costs, from groceries to utility bills, are rising faster for households in Japan, directly affecting spending power.

Investments, pensions and currencies: a firmer yen driven by BOJ rate expectations can affect returns for international investors holding Japanese assets, while UK, European and Asian exporters that sell into Japan or compete with Japanese firms watch the yen’s direction closely, since a stronger yen makes Japanese exports pricier and imports into Japan cheaper.

Related events

• Bank of Japan interest rate decisions, which respond directly to CPI trends
• Tokyo CPI, a preliminary read on national inflation published roughly three weeks before the national figure
• US and eurozone inflation releases, which shape the broader global backdrop against which the yen and other currencies trade

Frequently Asked Questions

What time is the Japan CPI report released?

The Statistics Bureau of Japan releases the CPI at 8:30 am Japan Standard Time, which is 7:30 pm ET the previous day and 12:30 am in London.

How should I read the headline versus core CPI figures?

Headline CPI includes all items, while core CPI excludes fresh food (and sometimes energy too) to show the underlying inflation trend that the Bank of Japan focuses on for policy decisions.

How does Japan CPI affect interest rates?

Persistently high core CPI readings increase the likelihood that the Bank of Japan will raise its policy rate further, while weaker readings reduce that pressure.

Where can I find the official Japan CPI release?

The data is published on the Statistics Bureau of Japan’s official CPI page.

When is the next Japan CPI report due?

The following month’s CPI report, covering September 2026 data, is typically published in the second half of October, following the Statistics Bureau’s usual release pattern.

Results: Japan CPI, August 2026

Japan’s Statistics Bureau reported on September 18, 2026 that headline CPI held steady at 1.9% year-on-year in August, while the closely watched core measure, which excludes fresh food, eased to 1.7%, a touch below the 1.8% level economists had expected and down from July’s 1.8%. This was the first slowdown in core inflation in four months. The Statistics Bureau and the Ministry of Internal Affairs and Communications attributed the softer core reading largely to government subsidies on utilities and fuel offsetting steady gains in food and discretionary spending, according to The Japan Times and Investing.com.

The August data landed hours before the Bank of Japan’s policy decision on the same day, and the readings mattered directly for that meeting. Capital Economics told Investing.com that inflation was little changed in August but that mounting energy cost pressures point to core inflation rising above the BOJ’s 2% target before long. The print broadly matched the “in line with the prior trend” scenario outlined ahead of release, rather than a sharp acceleration or deceleration.

Market Reaction

Japanese asset prices reacted in an unusual way once the CPI figures were followed by the Bank of Japan’s decision to raise its policy rate by 25 basis points to 1.25%, the highest level since 1995. Rather than strengthening on higher rates, the yen weakened past 157 against the dollar, and the yield on the benchmark 10-year Japanese government bond slipped around 4.9 basis points to 2.947%, according to CNBC. The Nikkei 225 gained between 1.5% and 2.1% over the session, extending gains after the rate decision, according to Investing.com.

Analysts pointed to two dissenting votes on the nine-member BOJ board, from members Toichiro Asada and Ayano Sato, and the absence of updated economic forecasts, as reasons markets treated the hike as less hawkish than the headline rate move suggested, according to CNBC. Attention now turns to whether a further hike arrives around December, with the widening gap between US and Japanese interest rates continuing to weigh on the yen.

What this means for your money now

The softer core inflation print, alongside a rate hike that still left the yen weaker rather than stronger, means the near-term outlook for UK, European and Asian holders of yen-denominated assets or Japanese exporters has not changed dramatically. A weaker yen continues to make Japanese exports more competitive globally and imports into Japan more expensive, while Japanese borrowers face a gradually rising cost of credit as the BOJ’s policy rate climbs toward its highest level in three decades.