Chiba千葉県
Sanmu 山武市
Data last updated:
Sanmu, Chiba, Japan has a population of 44,973 (2025 national census). IPSS projections estimate 41,647 by 2030 and 27,339 by 2050 (a decrease of about 43.6% from 2020), with the share of residents aged 65+ rising from 35.9% in 2020 to 53.9%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025年
(实际)
44,973人
2030年
(预测)
41,647人
▼ -14.0%
2040年
(预测)
34,396人
▼ -29.0%
2050年
(预测)
27,339人
▼ -43.6%
Change vs. 2020 census
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Chiba (千葉県)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。
Sanmu 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 | 43,954 | ▼ -9.3% | Census |
| 1985 | 46,299 | ▼ -4.4% | Census |
| 1990 | 50,692 | ▲ +4.6% | Census |
| 1995 | 58,405 | ▲ +20.6% | Census |
| 2000 | 60,614 | ▲ +25.1% | Census |
| 2005 | 59,024 | ▲ +21.8% | Census |
| 2010 | 56,089 | ▲ +15.8% | Census |
| 2015 | 52,222 | ▲ +7.8% | Census |
| 2020 | 48,444 | — | Census |
| 2025 | 44,973 | ▼ -7.2% | Census |
| 2030 | 41,647 | ▼ -14.0% | Projection |
| 2035 | 38,059 | ▼ -21.4% | Projection |
| 2040 | 34,396 | ▼ -29.0% | Projection |
| 2045 | 30,775 | ▼ -36.5% | Projection |
| 2050 | 27,339 | ▼ -43.6% | Projection |
About Sanmu
Overview
Sanmu (山武市) is a municipality in Chiba, Japan, with a population of 44,973 as of 2025.
Population Projection of Sanmu
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Sanmu's population is expected to reach 41,647 by 2030 (-14.0%), 34,396 by 2040 (-29.0%), and 27,339 by 2050 (-43.6%). A significant population decline is projected over the next three decades.
Aging Rate of Sanmu
The aging rate (percentage of residents aged 65 and over) is 35.9% as of 2020 and is projected to rise to 53.9% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Sanmu is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #582 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #332 out of 1903 nationwide.
- Population size: Ranked #725 out of 1917 nationwide.
- Related: National rankings / All municipalities in Chiba
Chiba (千葉県)的收入水平: Chiba (千葉県)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