Yamagata山形県
Nagai 長井市
Data last updated:
Nagai, Yamagata, Japan has a population of 24,561 (2025 national census). IPSS projections estimate 23,140 by 2030 and 16,881 by 2050 (a decrease of about 36.4% from 2020), with the share of residents aged 65+ rising from 35.7% in 2020 to 44.6%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
24,561
2030
(Projection)
23,140
▼ -12.8%
2040
(Projection)
20,005
▼ -24.6%
2050
(Projection)
16,881
▼ -36.4%
Change vs. 2020 census
Enter your age
See the population of 長井市 when you turn 50, 60, 70 and 80.
Other municipalities in Yamagata (山形県)
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.
Nagai 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 | 33,286 | ▲ +25.4% | Census |
| 1985 | 33,490 | ▲ +26.2% | Census |
| 1990 | 33,260 | ▲ +25.3% | Census |
| 1995 | 32,727 | ▲ +23.3% | Census |
| 2000 | 31,987 | ▲ +20.5% | Census |
| 2005 | 30,929 | ▲ +16.5% | Census |
| 2010 | 29,473 | ▲ +11.0% | Census |
| 2015 | 27,757 | ▲ +4.6% | Census |
| 2020 | 26,543 | — | Census |
| 2025 | 24,561 | ▼ -7.5% | Census |
| 2030 | 23,140 | ▼ -12.8% | Projection |
| 2035 | 21,564 | ▼ -18.8% | Projection |
| 2040 | 20,005 | ▼ -24.6% | Projection |
| 2045 | 18,441 | ▼ -30.5% | Projection |
| 2050 | 16,881 | ▼ -36.4% | Projection |
About Nagai
Overview
Nagai (長井市) is a municipality in Yamagata, Japan, with a population of 24,561 as of 2025.
Population Projection of Nagai
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Nagai's population is expected to reach 23,140 by 2030 (-12.8%), 20,005 by 2040 (-24.6%), and 16,881 by 2050 (-36.4%). A significant population decline is projected over the next three decades.
Aging Rate of Nagai
The aging rate (percentage of residents aged 65 and over) is 35.7% as of 2020 and is projected to rise to 44.6% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Nagai's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #841 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #905 out of 1903 nationwide.
- Population size: Ranked #998 out of 1917 nationwide.
- Related: National rankings / All municipalities in Yamagata
Earnings in Yamagata (山形県): Average salary in Yamagata (山形県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure