Utilities (fuel & water) · code 3600
City gas
都市ガス代
Key facts
As of August 2026, city gas prices in Japan are down 0.9% year on year and up 17.9% over five years. The official consumer price index stands at 115.4 (2020 = 100), up 250.8% versus January 1970, when the series begins.
City gas sits in the utilities (fuel & water) group of Japan's CPI basket, with 680 monthly observations from January 1970 to August 2026. The series peaked at 144.9 in January 2023 and bottomed at 32.3 in April 1972; the latest reading is -20.4% against that peak. Against ten years ago it is +24.6%.
Latest CPI
115.4
2026-08 (2020=100)
YoY %
-0.9%
5y change %
+17.9%
Change since 1970-01
+250.8%
Annual average index by year
| Year | Index | YoY % | Months |
|---|---|---|---|
| 2015 | 111.3 | -3.6% | 12 |
| 2016 | 96.0 | -13.7% | 12 |
| 2017 | 95.9 | -0.1% | 12 |
| 2018 | 99.8 | +4.1% | 12 |
| 2019 | 103.6 | +3.8% | 12 |
| 2020 | 100.0 | -3.5% | 12 |
| 2021 | 97.9 | -2.1% | 12 |
| 2022 | 122.4 | +25.0% | 12 |
| 2023 | 118.5 | -3.2% | 12 |
| 2024 | 117.4 | -0.9% | 12 |
| 2025 | 119.6 | +1.9% | 12 |
| 2026 | 115.8 | -3.2% | 8 |
Average of the monthly index values in each year (2020 = 100). Blank months are excluded.
Frequently asked questions
- How much have city gas prices changed in Japan over the past year?
- As of August 2026, -0.9% year on year, measured by Japan's official consumer price index (2020 = 100).
- How much have city gas prices changed in Japan over the past five years?
- +17.9% compared with the same month five years earlier. The index now reads 115.4.
- When were city gas prices in Japan at their highest?
- The series peaked at 144.9 in January 2023. The latest reading is -20.4% against that peak.
- What is the difference between the index and the yen price?
- This page carries two kinds of number. The index (2020 = 100) measures percentage change over time and is not a yen amount; the yen figure is an actual average retail price from the government's retail price survey. Source: 総務省統計局 消費者物価指数 (e-Stat table 0003427113, nationwide, monthly).