Shiranui (dekopon)
Average retail price
- Cheapest surveyed city
- ¥568 Miyazaki
- Priciest surveyed city
- ¥1,591 Niigata
Retail price survey conducted by the Statistics Bureau of Japan. This is a survey average, not a shop price — actual prices vary by store. 総務省統計局 小売物価統計調査 · Surveyed items and specifications
Key facts
Shiranui (dekopon) costs ¥1,004 per kg in Japan as of May 2026 — the unweighted average of 47 surveyed cities. Measured as an index, the official CPI for shiranui (dekopon) reads 124.0 (2020 = 100) in May 2026, down 21.1% year on year and down 0.2% over five years.
Shiranui (dekopon) sits in the food group of Japan's CPI basket, with 48 monthly observations from February 2015 to May 2026. The series peaked at 157.1 in May 2025 and bottomed at 73.5 in March 2015; the latest reading is -21.1% against that peak. Against ten years ago it is +3.4%.
Annual average index by year
| Year | Index | YoY % | Months |
|---|---|---|---|
| 2015 | 85.2 | — | 4 |
| 2016 | 103.8 | +21.8% | 4 |
| 2017 | 95.6 | -7.9% | 4 |
| 2018 | 95.3 | -0.3% | 4 |
| 2019 | 97.0 | +1.8% | 4 |
| 2020 | 104.1 | +7.3% | 4 |
| 2021 | 108.5 | +4.2% | 4 |
| 2022 | 114.7 | +5.7% | 4 |
| 2023 | 116.6 | +1.7% | 4 |
| 2024 | 129.1 | +10.7% | 4 |
| 2025 | 148.7 | +15.2% | 4 |
| 2026 | 124.9 | -16.0% | 4 |
Average of the monthly index values in each year (2020 = 100). Blank months are excluded.
Average retail price by month
| 2026-05 | ¥1,004 |
|---|---|
| 2026-04 | ¥1,002 |
| 2026-03 | ¥1,014 |
| 2026-02 | ¥1,121 |
Frequently asked questions
- How much does shiranui (dekopon) cost in Japan?
- ¥1,004 per kg, as of May 2026 — the unweighted average of 47 surveyed cities in the government's retail price survey.
- Which Japanese city has the cheapest shiranui (dekopon)?
- Among the surveyed cities in May 2026, Miyazaki was cheapest at ¥568 and Niigata the most expensive at ¥1,591.
- How much have shiranui (dekopon) prices changed in Japan over the past year?
- As of May 2026, -21.1% year on year, measured by Japan's official consumer price index (2020 = 100).
- How much have shiranui (dekopon) prices changed in Japan over the past five years?
- -0.2% compared with the same month five years earlier. The index now reads 124.0.
- When were shiranui (dekopon) prices in Japan at their highest?
- The series peaked at 157.1 in May 2025. The latest reading is -21.1% 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).