Yamaguchi山口県
Yanai 柳井市
Data last updated:
Yanai, Yamaguchi, Japan has a population of 28,512 (2025 national census). IPSS projections estimate 26,548 by 2030 and 19,224 by 2050 (a decrease of about 37.6% from 2020), with the share of residents aged 65+ rising from 39.2% in 2020 to 48.0%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025年
(实际)
28,512人
2030年
(预测)
26,548人
▼ -13.8%
2040年
(预测)
22,729人
▼ -26.2%
2050年
(预测)
19,224人
▼ -37.6%
Change vs. 2020 census
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Yamaguchi (山口県)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。
Yanai 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 | 42,912 | ▲ +39.3% | Census |
| 1985 | 41,798 | ▲ +35.7% | Census |
| 1990 | 40,478 | ▲ +31.4% | Census |
| 1995 | 38,963 | ▲ +26.5% | Census |
| 2000 | 37,251 | ▲ +20.9% | Census |
| 2005 | 35,927 | ▲ +16.6% | Census |
| 2010 | 34,730 | ▲ +12.8% | Census |
| 2015 | 32,945 | ▲ +7.0% | Census |
| 2020 | 30,799 | — | Census |
| 2025 | 28,512 | ▼ -7.4% | Census |
| 2030 | 26,548 | ▼ -13.8% | Projection |
| 2035 | 24,629 | ▼ -20.0% | Projection |
| 2040 | 22,729 | ▼ -26.2% | Projection |
| 2045 | 20,944 | ▼ -32.0% | Projection |
| 2050 | 19,224 | ▼ -37.6% | Projection |
About Yanai
Overview
Yanai (柳井市) is a municipality in Yamaguchi, Japan, with a population of 28,512 as of 2025.
Population Projection of Yanai
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Yanai's population is expected to reach 26,548 by 2030 (-13.8%), 22,729 by 2040 (-26.2%), and 19,224 by 2050 (-37.6%). A significant population decline is projected over the next three decades.
Aging Rate of Yanai
The aging rate (percentage of residents aged 65 and over) is 39.2% as of 2020 and is projected to rise to 48.0% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Yanai's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #807 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #690 out of 1903 nationwide.
- Population size: Ranked #935 out of 1917 nationwide.
- Related: National rankings / All municipalities in Yamaguchi
Yamaguchi (山口県)的收入水平: Yamaguchi (山口県)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