Chiba千葉県
Chounan 長南町
Data last updated:
Chounan, Chiba, Japan has a population of 6,691 (2025 national census). IPSS projections estimate 5,764 by 2030 and 3,192 by 2050 (a decrease of about 55.7% from 2020), with the share of residents aged 65+ rising from 44.7% in 2020 to 62.6%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
6,691
2030
(Projection)
5,764
▼ -19.9%
2040
(Projection)
4,437
▼ -38.4%
2050
(Projection)
3,192
▼ -55.7%
Change vs. 2020 census
Enter your age
See the population of 長南町 when you turn 50, 60, 70 and 80.
Other municipalities in Chiba (千葉県)
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.
Chounan 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 | 11,509 | ▲ +59.9% | Census |
| 1985 | 11,640 | ▲ +61.7% | Census |
| 1990 | 11,482 | ▲ +59.5% | Census |
| 1995 | 11,339 | ▲ +57.5% | Census |
| 2000 | 10,628 | ▲ +47.7% | Census |
| 2005 | 9,824 | ▲ +36.5% | Census |
| 2010 | 9,073 | ▲ +26.0% | Census |
| 2015 | 8,206 | ▲ +14.0% | Census |
| 2020 | 7,198 | — | Census |
| 2025 | 6,691 | ▼ -7.0% | Census |
| 2030 | 5,764 | ▼ -19.9% | Projection |
| 2035 | 5,089 | ▼ -29.3% | Projection |
| 2040 | 4,437 | ▼ -38.4% | Projection |
| 2045 | 3,792 | ▼ -47.3% | Projection |
| 2050 | 3,192 | ▼ -55.7% | Projection |
About Chounan
Overview
Chounan (長南町) is a municipality in Chiba, Japan, with a population of 6,691 as of 2025.
Population Projection of Chounan
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Chounan's population is expected to reach 5,764 by 2030 (-19.9%), 4,437 by 2040 (-38.4%), and 3,192 by 2050 (-55.7%). The town is projected to lose more than half its population over 30 years.
Aging Rate of Chounan
The aging rate (percentage of residents aged 65 and over) is 44.7% as of 2020 and is projected to rise to 62.6% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Chounan is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #151 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #60 out of 1903 nationwide.
- Population size: Ranked #1486 out of 1917 nationwide.
- Related: National rankings / All municipalities in Chiba
Earnings in Chiba (千葉県): Average salary in Chiba (千葉県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure