Gunma群馬県
Kusatsu 草津町
Data last updated:
Kusatsu, Gunma, Japan has a population of 5,753 (2025 national census). IPSS projections estimate 5,087 by 2030 and 3,386 by 2050 (a decrease of about 44.0% from 2020), with the share of residents aged 65+ rising from 41.0% in 2020 to 47.2%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
5,753
2030
(Projection)
5,087
▼ -15.9%
2040
(Projection)
4,150
▼ -31.4%
2050
(Projection)
3,386
▼ -44.0%
Change vs. 2020 census
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Other municipalities in Gunma (群馬県)
Data Sources
- Portal Site of Official Statistics of Japan (e-Stat)（https://www.e-stat.go.jp/）
- National Institute of Population and Social Security Research (IPSS), Regional Population Projections (2023 ed.)
* This service uses the e-Stat API but its content is not guaranteed by the Japanese government.
Kusatsu Population Table (1980–2050)
Population by year: national census results (restated to current municipal boundaries) and IPSS (2023) projections based on the 2020 census.
| Year | Population | vs 2020 | Type |
|---|---|---|---|
| 1980 | 9,341 | ▲ +54.4% | Census |
| 1985 | 8,945 | ▲ +47.9% | Census |
| 1990 | 8,620 | ▲ +42.5% | Census |
| 1995 | 8,294 | ▲ +37.1% | Census |
| 2000 | 7,702 | ▲ +27.3% | Census |
| 2005 | 7,602 | ▲ +25.7% | Census |
| 2010 | 7,160 | ▲ +18.4% | Census |
| 2015 | 6,518 | ▲ +7.8% | Census |
| 2020 | 6,049 | — | Census |
| 2025 | 5,753 | ▼ -4.9% | Census |
| 2030 | 5,087 | ▼ -15.9% | Projection |
| 2035 | 4,593 | ▼ -24.1% | Projection |
| 2040 | 4,150 | ▼ -31.4% | Projection |
| 2045 | 3,740 | ▼ -38.2% | Projection |
| 2050 | 3,386 | ▼ -44.0% | Projection |
About Kusatsu
Overview
Kusatsu (草津町) is a municipality in Gunma, Japan, with a population of 5,753 as of 2025.
Population Projection of Kusatsu
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kusatsu's population is expected to reach 5,087 by 2030 (-15.9%), 4,150 by 2040 (-31.4%), and 3,386 by 2050 (-44.0%). A significant population decline is projected over the next three decades.
Aging Rate of Kusatsu
The aging rate (percentage of residents aged 65 and over) is 41.0% as of 2020 and is projected to rise to 47.2% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Kusatsu is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #564 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #738 out of 1903 nationwide.
- Population size: Ranked #1547 out of 1917 nationwide.
- Related: National rankings / All municipalities in Gunma
Earnings in Gunma (群馬県): Average salary in Gunma (群馬県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure