Nagano長野県
Yamanouchi 山ノ内町
Data last updated:
Yamanouchi, Nagano, Japan has a population of 10,294 (2025 national census). IPSS projections estimate 9,210 by 2030 and 5,578 by 2050 (a decrease of about 50.9% from 2020), with the share of residents aged 65+ rising from 42.0% in 2020 to 56.7%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025年
(实际)
10,294人
2030年
(预测)
9,210人
▼ -18.9%
2040年
(预测)
7,273人
▼ -35.9%
2050年
(预测)
5,578人
▼ -50.9%
Change vs. 2020 census
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Nagano (長野県)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。
Yamanouchi 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 | 18,964 | ▲ +67.1% | Census |
| 1985 | 18,546 | ▲ +63.4% | Census |
| 1990 | 17,680 | ▲ +55.7% | Census |
| 1995 | 16,951 | ▲ +49.3% | Census |
| 2000 | 15,900 | ▲ +40.1% | Census |
| 2005 | 14,704 | ▲ +29.5% | Census |
| 2010 | 13,678 | ▲ +20.5% | Census |
| 2015 | 12,429 | ▲ +9.5% | Census |
| 2020 | 11,352 | — | Census |
| 2025 | 10,294 | ▼ -9.3% | Census |
| 2030 | 9,210 | ▼ -18.9% | Projection |
| 2035 | 8,218 | ▼ -27.6% | Projection |
| 2040 | 7,273 | ▼ -35.9% | Projection |
| 2045 | 6,391 | ▼ -43.7% | Projection |
| 2050 | 5,578 | ▼ -50.9% | Projection |
About Yamanouchi
Overview
Yamanouchi (山ノ内町) is a municipality in Nagano, Japan, with a population of 10,294 as of 2025.
Population Projection of Yamanouchi
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Yamanouchi's population is expected to reach 9,210 by 2030 (-18.9%), 7,273 by 2040 (-35.9%), and 5,578 by 2050 (-50.9%). The town is projected to lose more than half its population over 30 years.
Aging Rate of Yamanouchi
The aging rate (percentage of residents aged 65 and over) is 42.0% as of 2020 and is projected to rise to 56.7% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Yamanouchi is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #306 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #210 out of 1903 nationwide.
- Population size: Ranked #1339 out of 1917 nationwide.
- Related: National rankings / All municipalities in Nagano
Nagano (長野県)的收入水平: Nagano (長野県)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