Ibaraki茨城県
Shimotsuma 下妻市
Data last updated:
Shimotsuma, Ibaraki, Japan has a population of 40,750 (2025 national census). IPSS projections estimate 39,093 by 2030 and 30,931 by 2050 (a decrease of about 27.3% from 2020), with the share of residents aged 65+ rising from 28.5% in 2020 to 41.6%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
40,750
2030
(Projection)
39,093
▼ -8.1%
2040
(Projection)
35,266
▼ -17.1%
2050
(Projection)
30,931
▼ -27.3%
Change vs. 2020 census
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Other municipalities in Ibaraki (茨城県)
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.
Shimotsuma 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 | 39,337 | ▼ -7.5% | Census |
| 1985 | 41,506 | ▼ -2.4% | Census |
| 1990 | 42,704 | ▲ +0.4% | Census |
| 1995 | 45,466 | ▲ +6.9% | Census |
| 2000 | 46,544 | ▲ +9.5% | Census |
| 2005 | 46,435 | ▲ +9.2% | Census |
| 2010 | 44,987 | ▲ +5.8% | Census |
| 2015 | 43,293 | ▲ +1.8% | Census |
| 2020 | 42,521 | — | Census |
| 2025 | 40,750 | ▼ -4.2% | Census |
| 2030 | 39,093 | ▼ -8.1% | Projection |
| 2035 | 37,255 | ▼ -12.4% | Projection |
| 2040 | 35,266 | ▼ -17.1% | Projection |
| 2045 | 33,126 | ▼ -22.1% | Projection |
| 2050 | 30,931 | ▼ -27.3% | Projection |
About Shimotsuma
Overview
Shimotsuma (下妻市) is a municipality in Ibaraki, Japan, with a population of 40,750 as of 2025.
Population Projection of Shimotsuma
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Shimotsuma's population is expected to reach 39,093 by 2030 (-8.1%), 35,266 by 2040 (-17.1%), and 30,931 by 2050 (-27.3%). A significant population decline is projected over the next three decades.
Aging Rate of Shimotsuma
The aging rate (percentage of residents aged 65 and over) is 28.5% as of 2020 and is projected to rise to 41.6% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Shimotsuma's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1139 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1117 out of 1903 nationwide.
- Population size: Ranked #772 out of 1917 nationwide.
- Related: National rankings / All municipalities in Ibaraki
Earnings in Ibaraki (茨城県): Average salary in Ibaraki (茨城県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure