Japan CPI September 2026
September 17 @ 7:30 pm - 8:30 pm
Japan CPI September 2026
Next Japan CPI: Friday, at 8:30 am JST (7:30 pm ET, 12:30 am London). Covers August 2026 data.
- Consensus
- Not yet published
- Prior
- Core CPI 1.8% YoY (July 2026)
- Actual
- Pending
Full schedule and background: Japan CPI.
Updated
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.
| Measure | Prior (July 2026) | Consensus (August 2026) |
|---|---|---|
| Headline CPI (YoY) | 1.9% | Not yet published |
| Core CPI, ex fresh food (YoY) | 1.8% | Not yet published |
| Core-core CPI, ex fresh food and energy (YoY) | 1.9% | Not yet published |
What the result could mean
| Scenario | Likely market read | What it means in plain English |
|---|---|---|
| Above consensus | Yen could strengthen and Japanese government bond yields could rise if traders see this as supporting further Bank of Japan rate hikes | Prices are rising faster than expected, adding pressure on the BOJ to keep tightening policy, which can make borrowing costlier at home but may attract investors seeking higher Japanese yields |
| In line with prior trend | Muted reaction, as this would confirm the gradual pickup in inflation seen since spring, described by Trading Economics as broadening price pressure | Inflation is behaving roughly as expected, so the BOJ is unlikely to change its cautious, gradual approach to rate decisions |
| Below consensus | Yen could soften if markets read this as reducing the urgency for the BOJ to raise rates further | Price growth is cooling, which could ease pressure on household budgets but may also signal weaker demand in the economy |
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.