Yamaguchi山口県
Nagato 長門市
Data last updated:
Nagato, Yamaguchi, Japan has a population of 28,791 (2025 national census). IPSS projections estimate 26,345 by 2030 and 16,197 by 2050 (a decrease of about 50.2% from 2020), with the share of residents aged 65+ rising from 44.1% in 2020 to 54.9%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
28,791
2030
(Projection)
26,345
▼ -19.0%
2040
(Projection)
20,928
▼ -35.6%
2050
(Projection)
16,197
▼ -50.2%
Change vs. 2020 census
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Other municipalities in Yamaguchi (山口県)
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.
Nagato 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 | 50,892 | ▲ +56.5% | Census |
| 1985 | 50,259 | ▲ +54.6% | Census |
| 1990 | 47,656 | ▲ +46.5% | Census |
| 1995 | 45,565 | ▲ +40.1% | Census |
| 2000 | 43,473 | ▲ +33.7% | Census |
| 2005 | 41,127 | ▲ +26.5% | Census |
| 2010 | 38,349 | ▲ +17.9% | Census |
| 2015 | 35,439 | ▲ +9.0% | Census |
| 2020 | 32,519 | — | Census |
| 2025 | 28,791 | ▼ -11.5% | Census |
| 2030 | 26,345 | ▼ -19.0% | Projection |
| 2035 | 23,572 | ▼ -27.5% | Projection |
| 2040 | 20,928 | ▼ -35.6% | Projection |
| 2045 | 18,433 | ▼ -43.3% | Projection |
| 2050 | 16,197 | ▼ -50.2% | Projection |
About Nagato
Overview
Nagato (長門市) is a municipality in Yamaguchi, Japan, with a population of 28,791 as of 2025.
Population Projection of Nagato
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Nagato's population is expected to reach 26,345 by 2030 (-19.0%), 20,928 by 2040 (-35.6%), and 16,197 by 2050 (-50.2%). The town is projected to lose more than half its population over 30 years.
Aging Rate of Nagato
The aging rate (percentage of residents aged 65 and over) is 44.1% as of 2020 and is projected to rise to 54.9% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Nagato is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #337 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #283 out of 1903 nationwide.
- Population size: Ranked #930 out of 1917 nationwide.
- Related: National rankings / All municipalities in Yamaguchi
Earnings in Yamaguchi (山口県): Average salary in Yamaguchi (山口県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure