Okayama岡山県
Kumenan 久米南町
Data last updated:
Kumenan, Okayama, Japan has a population of 4,041 (2025 national census). IPSS projections estimate 3,758 by 2030 and 2,559 by 2050 (a decrease of about 43.5% from 2020), with the share of residents aged 65+ rising from 44.9% in 2020 to 50.1%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025Census
4,041
2030Projection
3,758
▼ -17.0%
2040Projection
3,111
▼ -31.3%
2050Projection
2,559
▼ -43.5%
Change vs. 2020 census
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Other municipalities in Okayama (岡山県)
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.
Kumenan 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 | 7,257 | ▲ +60.2% | Census |
| 1985 | 7,005 | ▲ +54.6% | Census |
| 1990 | 6,605 | ▲ +45.8% | Census |
| 1995 | 6,266 | ▲ +38.3% | Census |
| 2000 | 6,115 | ▲ +35.0% | Census |
| 2005 | 5,690 | ▲ +25.6% | Census |
| 2010 | 5,296 | ▲ +16.9% | Census |
| 2015 | 4,907 | ▲ +8.3% | Census |
| 2020 | 4,530 | — | Census |
| 2025 | 4,041 | ▼ -10.8% | Census |
| 2030 | 3,758 | ▼ -17.0% | Projection |
| 2035 | 3,430 | ▼ -24.3% | Projection |
| 2040 | 3,111 | ▼ -31.3% | Projection |
| 2045 | 2,832 | ▼ -37.5% | Projection |
| 2050 | 2,559 | ▼ -43.5% | Projection |
About Kumenan
Overview
Kumenan (久米南町) is a municipality in Okayama, Japan, with a population of 4,041 as of 2025.
Population Projection of Kumenan
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kumenan's population is expected to reach 3,758 by 2030 (-17.0%), 3,111 by 2040 (-31.3%), and 2,559 by 2050 (-43.5%). A significant population decline is projected over the next three decades.
Aging Rate of Kumenan
The aging rate (percentage of residents aged 65 and over) is 44.9% as of 2020 and is projected to rise to 50.1% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Kumenan is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #584 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #553 out of 1903 nationwide.
- Population size: Ranked #1658 out of 1917 nationwide.
- Related: National rankings / All municipalities in Okayama
Earnings in Okayama (岡山県): Average salary in Okayama (岡山県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure