Education · code 8100
Study reference materials
学習参考教材
Key facts
As of August 2026, study reference materials prices in Japan are up 3.6% year on year and up 10.8% over five years. The official consumer price index stands at 110.8 (2020 = 100), up 352.2% versus January 1970, when the series begins.
Study reference materials sits in the education group of Japan's CPI basket, with 680 monthly observations from January 1970 to August 2026. The series peaked at 110.8 in June 2026 and bottomed at 24.5 in January 1970; the latest reading is 0.0% against that peak. Against ten years ago it is +13.9%.
Latest CPI
110.8
2026-08 (2020=100)
YoY %
+3.6%
5y change %
+10.8%
Change since 1970-01
+352.2%
Annual average index by year
| Year | Index | YoY % | Months |
|---|---|---|---|
| 2015 | 97.3 | +0.7% | 12 |
| 2016 | 97.3 | 0.0% | 12 |
| 2017 | 98.1 | +0.8% | 12 |
| 2018 | 98.2 | +0.1% | 12 |
| 2019 | 98.7 | +0.5% | 12 |
| 2020 | 100.0 | +1.3% | 12 |
| 2021 | 100.0 | 0.0% | 12 |
| 2022 | 102.8 | +2.8% | 12 |
| 2023 | 103.4 | +0.6% | 12 |
| 2024 | 106.9 | +3.4% | 12 |
| 2025 | 106.9 | 0.0% | 12 |
| 2026 | 109.0 | +2.0% | 8 |
Average of the monthly index values in each year (2020 = 100). Blank months are excluded.
Frequently asked questions
- How much have study reference materials prices changed in Japan over the past year?
- As of August 2026, +3.6% year on year, measured by Japan's official consumer price index (2020 = 100).
- How much have study reference materials prices changed in Japan over the past five years?
- +10.8% compared with the same month five years earlier. The index now reads 110.8.
- When were study reference materials prices in Japan at their highest?
- The series peaked at 110.8 in June 2026. The latest reading is 0.0% 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).
Other items in this category
Cram school (elementary)
112.8 · +2.3%
Cram school (high school / yobiko)
126.4 · +3.7%
Cram school (junior high)
110.3 · +1.7%
High school tuition (private)
25.3 · -68.8%
High school tuition (public)
5.5 · 0.0%
Junior college tuition (private)
101.2 · +0.7%
Junior high tuition (private)
107.7 · +1.9%
PTA fee (elementary)
90.1 · -1.6%