How much does diapers (infant) cost in Japan?

¥380 per 10 sheets, as of September 2026 — the unweighted average of 81 surveyed cities in the government's retail price survey.

Which Japanese city has the cheapest diapers (infant)?

Among the surveyed cities in September 2026, Kawasaki was cheapest at ¥348 and Kumamoto the most expensive at ¥422.

How much have diapers (infant) prices changed in Japan over the past year?

As of September 2026, +6.7% year on year, measured by Japan's official consumer price index (2020 = 100).

How much have diapers (infant) prices changed in Japan over the past five years?

+31.4% compared with the same month five years earlier. The index now reads 129.7.

When were diapers (infant) prices in Japan at their highest?

The series peaked at 212.8 in February 1990. The latest reading is -39.1% 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).

Medical care · code 6141

Diapers (infant) price in Japan

紙おむつ（乳幼児用）

Average retail price

¥380per 10 sheets+7.1% year on year

2026-09 · unweighted average of 81 surveyed cities

Surveyed specification: 乳幼児用，パンツ型，Ｌサイズ，４４～４６枚入り

Cheapest surveyed city: ¥348 Kawasaki
Priciest surveyed city: ¥422 Kumamoto

Price in your city:

¥362per 10 sheets-4.7% vs national average#8 cheapest of 52 cities

See all 52 cities, cheapest first

#	City	Price (JPY) · per 10 sheets
1	Kawasaki	¥348
2	Naha	¥350
3	Mito	¥351
4	Hamamatsu	¥352
5	Sagamihara	¥354
6	Utsunomiya	¥358
7	Yamagata	¥360
8	Tokyo (23 wards)	¥362
9	Sendai	¥362
10	Maebashi	¥364
11	Oita	¥364
12	Saitama	¥366
13	Yokohama	¥366
14	Toyama	¥366
15	Nagano	¥366
16	Chiba	¥367
17	Kofu	¥367
18	Nagasaki	¥368
19	Sakai	¥370
20	Aomori	¥371
21	Sapporo	¥372
22	Gifu	¥372
23	Morioka	¥373
24	Wakayama	¥377
25	Yamaguchi	¥378
26	Okayama	¥380
27	Hiroshima	¥380
28	Fukushima	¥381
29	Nagoya	¥381
30	Shizuoka	¥382
31	Otsu	¥383
32	Takamatsu	¥384
33	Fukui	¥385
34	Tsu	¥385
35	Kobe	¥385
36	Tottori	¥385
37	Kochi	¥385
38	Kitakyushu	¥385
39	Fukuoka	¥390
40	Kagoshima	¥390
41	Matsue	¥391
42	Kyoto	¥392
43	Tokushima	¥392
44	Kanazawa	¥396
45	Miyazaki	¥396
46	Osaka	¥397
47	Nara	¥397
48	Niigata	¥398
49	Matsuyama	¥402
50	Saga	¥402
51	Akita	¥405
52	Kumamoto	¥422

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

Diapers (infant) costs ¥380 per 10 sheets in Japan as of September 2026 — the unweighted average of 81 surveyed cities, up 7.1% from a year earlier. Measured as an index, the official CPI for diapers (infant) reads 129.7 (2020 = 100) in September 2026, up 6.7% year on year and up 31.4% over five years.

Diapers (infant) sits in the medical care group of Japan's CPI basket, with 441 monthly observations from January 1990 to September 2026. The series peaked at 212.8 in February 1990 and bottomed at 98.1 in June 2013; the latest reading is -39.1% against that peak. Against ten years ago it is +27.2%.

Latest CPI

129.7

2026-09 (2020=100)

YoY %

+6.7%

5y change %

+31.4%

Change since 1990-01

-38.5%

Annual average index by year

Annual average consumer price index for Diapers (infant) in Japan (2020 = 100)
Year	Index	YoY %	Months
2015	102.9	+1.4%	12
2016	102.1	-0.8%	12
2017	100.3	-1.8%	12
2018	101.0	+0.7%	12
2019	102.2	+1.2%	12
2020	100.0	-2.2%	12
2021	98.7	-1.3%	12
2022	101.3	+2.6%	12
2023	107.8	+6.4%	12
2024	115.7	+7.3%	12
2025	121.6	+5.1%	12
2026	123.0	+1.2%	9

Average of the monthly index values in each year (2020 = 100). Blank months are excluded.

Average retail price by month

2026-09	¥380
2026-08	¥366
2026-07	¥365
2026-06	¥357
2026-05	¥355
2026-04	¥356
2026-03	¥351
2026-02	¥353
2026-01	¥353
2025-12	¥353
2025-11	¥354
2025-10	¥357
2025-09	¥355

Frequently asked questions

How much does diapers (infant) cost in Japan?: ¥380 per 10 sheets, as of September 2026 — the unweighted average of 81 surveyed cities in the government's retail price survey.
Which Japanese city has the cheapest diapers (infant)?: Among the surveyed cities in September 2026, Kawasaki was cheapest at ¥348 and Kumamoto the most expensive at ¥422.
How much have diapers (infant) prices changed in Japan over the past year?: As of September 2026, +6.7% year on year, measured by Japan's official consumer price index (2020 = 100).
How much have diapers (infant) prices changed in Japan over the past five years?: +31.4% compared with the same month five years earlier. The index now reads 129.7.
When were diapers (infant) prices in Japan at their highest?: The series peaked at 212.8 in February 1990. The latest reading is -39.1% 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).