How much does bath additive cost in Japan?

¥728 per box, as of September 2026 — the unweighted average of 47 surveyed cities in the government's retail price survey.

Which Japanese city has the cheapest bath additive?

Among the surveyed cities in September 2026, Hiroshima was cheapest at ¥627 and Naha the most expensive at ¥831.

How much have bath additive prices changed in Japan over the past year?

As of September 2026, +15.1% year on year, measured by Japan's official consumer price index (2020 = 100).

How much have bath additive prices changed in Japan over the past five years?

+15.0% compared with the same month five years earlier. The index now reads 115.3.

When were bath additive prices in Japan at their highest?

The series peaked at 205.0 in January 1990. The latest reading is -43.8% 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 6095

Bath additive price in Japan

入浴剤

Average retail price

¥728per box+14.7% year on year

2026-09 · unweighted average of 47 surveyed cities

Surveyed specification: 薬用入浴剤，錠剤，箱入り（４０ｇ×２０錠入り），「バブ」

Cheapest surveyed city: ¥627 Hiroshima
Priciest surveyed city: ¥831 Naha

Price in your city:

¥729per box+0.2% vs national average#26 cheapest of 47 cities

See all 47 cities, cheapest first

#	City	Price (JPY) · per box
1	Hiroshima	¥627
2	Chiba	¥657
3	Shizuoka	¥661
4	Sapporo	¥663
5	Mito	¥671
6	Matsue	¥671
7	Kagoshima	¥680
8	Matsuyama	¥691
9	Oita	¥691
10	Fukushima	¥697
11	Yokohama	¥701
12	Maebashi	¥706
13	Wakayama	¥706
14	Yamaguchi	¥709
15	Miyazaki	¥711
16	Yamagata	¥712
17	Utsunomiya	¥712
18	Kochi	¥716
19	Kyoto	¥717
20	Kumamoto	¥718
21	Otsu	¥720
22	Nagoya	¥723
23	Tottori	¥723
24	Fukuoka	¥726
25	Nagano	¥727
26	Tokyo (23 wards)	¥729
27	Okayama	¥730
28	Tokushima	¥731
29	Akita	¥735
30	Niigata	¥741
31	Kofu	¥742
32	Gifu	¥742
33	Sendai	¥748
34	Saga	¥748
35	Takamatsu	¥750
36	Fukui	¥753
37	Osaka	¥753
38	Nagasaki	¥761
39	Aomori	¥763
40	Kanazawa	¥766
41	Toyama	¥768
42	Nara	¥774
43	Saitama	¥787
44	Kobe	¥790
45	Morioka	¥804
46	Tsu	¥817
47	Naha	¥831

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

Bath additive costs ¥728 per box in Japan as of September 2026 — the unweighted average of 47 surveyed cities, up 14.7% from a year earlier. Measured as an index, the official CPI for bath additive reads 115.3 (2020 = 100) in September 2026, up 15.1% year on year and up 15.0% over five years.

Bath additive 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 205.0 in January 1990 and bottomed at 96.1 in February 2023; the latest reading is -43.8% against that peak. Against ten years ago it is +10.7%.

Latest CPI

115.3

2026-09 (2020=100)

YoY %

+15.1%

5y change %

+15.0%

Change since 1990-01

-43.8%

Annual average index by year

Annual average consumer price index for Bath additive in Japan (2020 = 100)
Year	Index	YoY %	Months
2015	104.4	+0.5%	12
2016	103.5	-0.9%	12
2017	102.3	-1.2%	12
2018	100.2	-2.1%	12
2019	98.9	-1.3%	12
2020	100.0	+1.1%	12
2021	99.5	-0.5%	12
2022	98.9	-0.6%	12
2023	99.0	+0.1%	12
2024	98.7	-0.3%	12
2025	99.4	+0.7%	12
2026	104.5	+5.1%	9

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

Average retail price by month

2026-09	¥728
2026-08	¥719
2026-07	¥702
2026-06	¥634
2026-05	¥636
2026-04	¥635
2026-03	¥629
2026-02	¥619
2026-01	¥622
2025-12	¥621
2025-11	¥627
2025-10	¥628
2025-09	¥634

Frequently asked questions

How much does bath additive cost in Japan?: ¥728 per box, as of September 2026 — the unweighted average of 47 surveyed cities in the government's retail price survey.
Which Japanese city has the cheapest bath additive?: Among the surveyed cities in September 2026, Hiroshima was cheapest at ¥627 and Naha the most expensive at ¥831.
How much have bath additive prices changed in Japan over the past year?: As of September 2026, +15.1% year on year, measured by Japan's official consumer price index (2020 = 100).
How much have bath additive prices changed in Japan over the past five years?: +15.0% compared with the same month five years earlier. The index now reads 115.3.
When were bath additive prices in Japan at their highest?: The series peaked at 205.0 in January 1990. The latest reading is -43.8% 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).