Kagoshima鹿児島県
Setouchi 瀬戸内町
Data last updated:
Setouchi, Kagoshima, Japan has a population of 7,651 (2025 national census). IPSS projections estimate 7,386 by 2030 and 5,511 by 2050 (a decrease of about 35.5% from 2020), with the share of residents aged 65+ rising from 38.1% in 2020 to 46.2%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
7,651
2030
(Projection)
7,386
▼ -13.6%
2040
(Projection)
6,432
▼ -24.7%
2050
(Projection)
5,511
▼ -35.5%
Change vs. 2020 census
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Other municipalities in Kagoshima (鹿児島県)
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.
Setouchi 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 | 14,309 | ▲ +67.4% | Census |
| 1985 | 13,269 | ▲ +55.3% | Census |
| 1990 | 12,566 | ▲ +47.0% | Census |
| 1995 | 12,017 | ▲ +40.6% | Census |
| 2000 | 11,649 | ▲ +36.3% | Census |
| 2005 | 10,782 | ▲ +26.2% | Census |
| 2010 | 9,874 | ▲ +15.5% | Census |
| 2015 | 9,042 | ▲ +5.8% | Census |
| 2020 | 8,546 | — | Census |
| 2025 | 7,651 | ▼ -10.5% | Census |
| 2030 | 7,386 | ▼ -13.6% | Projection |
| 2035 | 6,901 | ▼ -19.2% | Projection |
| 2040 | 6,432 | ▼ -24.7% | Projection |
| 2045 | 5,969 | ▼ -30.2% | Projection |
| 2050 | 5,511 | ▼ -35.5% | Projection |
About Setouchi
Overview
Setouchi (瀬戸内町) is a municipality in Kagoshima, Japan, with a population of 7,651 as of 2025.
Population Projection of Setouchi
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Setouchi's population is expected to reach 7,386 by 2030 (-13.6%), 6,432 by 2040 (-24.7%), and 5,511 by 2050 (-35.5%). A significant population decline is projected over the next three decades.
Aging Rate of Setouchi
The aging rate (percentage of residents aged 65 and over) is 38.1% as of 2020 and is projected to rise to 46.2% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Setouchi's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #880 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #813 out of 1903 nationwide.
- Population size: Ranked #1440 out of 1917 nationwide.
- Related: National rankings / All municipalities in Kagoshima
Earnings in Kagoshima (鹿児島県): Average salary in Kagoshima (鹿児島県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure