Ibaraki茨城県
Kasama 笠間市
Data last updated:
Kasama, Ibaraki, Japan has a population of 71,424 (2025 national census). IPSS projections estimate 66,140 by 2030 and 49,917 by 2050 (a decrease of about 31.8% from 2020), with the share of residents aged 65+ rising from 32.3% in 2020 to 45.4%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025年
(实际)
71,424人
2030年
(预测)
66,140人
▼ -9.6%
2040年
(预测)
58,126人
▼ -20.6%
2050年
(预测)
49,917人
▼ -31.8%
Change vs. 2020 census
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Ibaraki (茨城県)的其他市区町村
数据来源
- 日本政府统计综合窗口(e-Stat)（https://www.e-stat.go.jp/）
- 国立社会保障・人口问题研究所「日本地区别未来推计人口（令和5年推计）」
※本服务使用e-Stat的API功能，但服务内容不受日本政府保证。
Kasama 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 | 73,070 | ▼ -0.1% | Census |
| 1985 | 75,963 | ▲ +3.8% | Census |
| 1990 | 77,782 | ▲ +6.3% | Census |
| 1995 | 80,903 | ▲ +10.6% | Census |
| 2000 | 82,358 | ▲ +12.6% | Census |
| 2005 | 81,497 | ▲ +11.4% | Census |
| 2010 | 79,409 | ▲ +8.5% | Census |
| 2015 | 76,739 | ▲ +4.9% | Census |
| 2020 | 73,173 | — | Census |
| 2025 | 71,424 | ▼ -2.4% | Census |
| 2030 | 66,140 | ▼ -9.6% | Projection |
| 2035 | 62,228 | ▼ -15.0% | Projection |
| 2040 | 58,126 | ▼ -20.6% | Projection |
| 2045 | 53,973 | ▼ -26.2% | Projection |
| 2050 | 49,917 | ▼ -31.8% | Projection |
About Kasama
Overview
Kasama (笠間市) is a municipality in Ibaraki, Japan, with a population of 71,424 as of 2025.
Population Projection of Kasama
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kasama's population is expected to reach 66,140 by 2030 (-9.6%), 58,126 by 2040 (-20.6%), and 49,917 by 2050 (-31.8%). A significant population decline is projected over the next three decades.
Aging Rate of Kasama
The aging rate (percentage of residents aged 65 and over) is 32.3% as of 2020 and is projected to rise to 45.4% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Kasama's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #997 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #858 out of 1903 nationwide.
- Population size: Ranked #540 out of 1917 nationwide.
- Related: National rankings / All municipalities in Ibaraki
Ibaraki (茨城県)的收入水平: Ibaraki (茨城県)的平均年收入（按年龄、性别、企业规模）jpsalary / 厚生劳动省 工资结构基本统计调查