Gunma群馬県
Naganohara 長野原町
Data last updated:
Naganohara, Gunma, Japan has a population of 4,839 (2025 national census). IPSS projections estimate 4,219 by 2030 and 2,681 by 2050 (a decrease of about 47.4% from 2020), with the share of residents aged 65+ rising from 39.2% in 2020 to 54.1%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
4,839
2030
(Projection)
4,219
▼ -17.2%
2040
(Projection)
3,430
▼ -32.7%
2050
(Projection)
2,681
▼ -47.4%
Change vs. 2020 census
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Other municipalities in Gunma (群馬県)
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.
Naganohara 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 | 7,237 | ▲ +42.0% | Census |
| 1985 | 7,063 | ▲ +38.6% | Census |
| 1990 | 6,878 | ▲ +35.0% | Census |
| 1995 | 7,017 | ▲ +37.7% | Census |
| 2000 | 6,939 | ▲ +36.2% | Census |
| 2005 | 6,563 | ▲ +28.8% | Census |
| 2010 | 6,017 | ▲ +18.1% | Census |
| 2015 | 5,536 | ▲ +8.7% | Census |
| 2020 | 5,095 | — | Census |
| 2025 | 4,839 | ▼ -5.0% | Census |
| 2030 | 4,219 | ▼ -17.2% | Projection |
| 2035 | 3,821 | ▼ -25.0% | Projection |
| 2040 | 3,430 | ▼ -32.7% | Projection |
| 2045 | 3,047 | ▼ -40.2% | Projection |
| 2050 | 2,681 | ▼ -47.4% | Projection |
About Naganohara
Overview
Naganohara (長野原町) is a municipality in Gunma, Japan, with a population of 4,839 as of 2025.
Population Projection of Naganohara
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Naganohara's population is expected to reach 4,219 by 2030 (-17.2%), 3,430 by 2040 (-32.7%), and 2,681 by 2050 (-47.4%). A significant population decline is projected over the next three decades.
Aging Rate of Naganohara
The aging rate (percentage of residents aged 65 and over) is 39.2% as of 2020 and is projected to rise to 54.1% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Naganohara is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #437 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #315 out of 1903 nationwide.
- Population size: Ranked #1603 out of 1917 nationwide.
- Related: National rankings / All municipalities in Gunma
Earnings in Gunma (群馬県): Average salary in Gunma (群馬県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure