What is Japan's inflation rate?
Data through September 2026Japan's consumer prices were 2.1% higher in September 2026 than a year earlier, on the headline Consumer Price Index (all items) published by the Statistics Bureau of Japan.
That compares with 1.9% in August 2026. Core CPI (all items less fresh food) was 2.2% and core-core CPI (less fresh food and energy) was 2.4%.
Data through September 2026. Retrieved from the source on 2026-10-23. Calculated from published values; see the calculation below.
Show calculation
Definition
The Consumer Price Index (CPI) measures the average change in the prices of the goods and services households buy. Japan's national CPI is compiled by the Statistics Bureau of Japan and published monthly, in the second half of the following month, on a 2025 = 100 base.
The inflation rate quoted here is the headline index, all items, compared with the same month a year earlier. Two narrower measures are also watched: core CPI, which excludes fresh food, and core-core CPI, which excludes fresh food and energy as well. The Bank of Japan's 2% price stability target refers to the year-on-year change in the CPI.
Index levels are published to one decimal place. Rates on this page are calculated from those published levels, so a rate can differ from the Bureau's own published rate by up to 0.1 percentage points; the method is stated under Show calculation.
Headline CPI, Year over Year
Latest Readings
| Period | Index (2025=100) | YoY (%) |
|---|---|---|
| Sep 2026 | 102.2 | 2.1 |
| Aug 2026 | 102.2 | 1.9 |
| Jul 2026 | 102.0 | 1.9 |
| Jun 2026 | 101.6 | 1.7 |
| May 2026 | 101.5 | 1.5 |
| Apr 2026 | 101.0 | 1.3 |
| Mar 2026 | 100.6 | 1.4 |
| Feb 2026 | 100.2 | 1.3 |
| Jan 2026 | 100.8 | 1.5 |
| Dec 2025 | 100.9 | 2.0 |
| Nov 2025 | 101.0 | 2.7 |
| Oct 2025 | 100.7 | 2.9 |
| Sep 2025 | 100.1 | 2.9 |
How to Cite
Plover Analytics, “Japan inflation rate”, https://ploveranalytics.com/japan-inflation-rate.html, retrieved 2026-10-28. Source: Statistics Bureau of Japan.
The full series, every earlier release and a CSV with its sources in the header are on the data page. Values can be read as they stood on any earlier date through the API; guidance for quoting is in llms.txt.
Latest values as text and table
Consumer Price Index — categories
Latest reading, September 2026: Headline CPI · YoY 2.1%; Core CPI (less fresh food) · YoY 2.2%; Core-core CPI (less fresh food & energy) · YoY 2.4%; Headline CPI · MoM 0.0%; Headline CPI · 3m Annualized 2.4%.
| Period | Headline CPI (index) | Core CPI (less fresh food) (index) | Core-core CPI (less fresh food & energy) (index) | Headline CPI · YoY (%) |
|---|---|---|---|---|
| Sep 2026 | 102.2 | 102.3 | 102.8 | 2.1 |
| Aug 2026 | 102.2 | 102.0 | 102.5 | 1.9 |
| Jul 2026 | 102.0 | 102.1 | 102.1 | 1.9 |
| Jun 2026 | 101.6 | 101.7 | 101.7 | 1.7 |
| May 2026 | 101.5 | 101.6 | 101.6 | 1.5 |
| Apr 2026 | 101.0 | 101.1 | 101.4 | 1.3 |
| Mar 2026 | 100.6 | 100.7 | 101.4 | 1.4 |
| Feb 2026 | 100.2 | 100.2 | 101.1 | 1.3 |
| Jan 2026 | 100.8 | 100.7 | 101.0 | 1.5 |
| Dec 2025 | 100.9 | 100.9 | 101.1 | 2.0 |
| Nov 2025 | 101.0 | 101.1 | 101.2 | 2.7 |
| Oct 2025 | 100.7 | 100.7 | 101.1 | 2.9 |
| Sep 2025 | 100.1 | 100.1 | 100.4 | 2.9 |
YoY: (index[t] / index[t−12 months] − 1) × 100, from published index values.
Source: Statistics Bureau of Japan. · Data through September 2026 · JSON · CSV · Markdown