Fukuoka福岡県
Keisen 桂川町
Data last updated:
Keisen, Fukuoka, Japan has a population of 12,203 (2025 national census). IPSS projections estimate 11,440 by 2030 and 8,715 by 2050 (a decrease of about 32.3% from 2020), with the share of residents aged 65+ rising from 35.4% in 2020 to 41.4%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
12,203
2030
(Projection)
11,440
▼ -11.2%
2040
(Projection)
10,051
▼ -22.0%
2050
(Projection)
8,715
▼ -32.3%
Change vs. 2020 census
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Other municipalities in Fukuoka (福岡県)
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.
Keisen 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 | 12,780 | ▼ -0.8% | Census |
| 1985 | 13,741 | ▲ +6.7% | Census |
| 1990 | 14,182 | ▲ +10.1% | Census |
| 1995 | 14,667 | ▲ +13.9% | Census |
| 2000 | 14,760 | ▲ +14.6% | Census |
| 2005 | 14,535 | ▲ +12.9% | Census |
| 2010 | 13,863 | ▲ +7.6% | Census |
| 2015 | 13,496 | ▲ +4.8% | Census |
| 2020 | 12,878 | — | Census |
| 2025 | 12,203 | ▼ -5.2% | Census |
| 2030 | 11,440 | ▼ -11.2% | Projection |
| 2035 | 10,751 | ▼ -16.5% | Projection |
| 2040 | 10,051 | ▼ -22.0% | Projection |
| 2045 | 9,357 | ▼ -27.3% | Projection |
| 2050 | 8,715 | ▼ -32.3% | Projection |
About Keisen
Overview
Keisen (桂川町) is a municipality in Fukuoka, Japan, with a population of 12,203 as of 2025.
Population Projection of Keisen
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Keisen's population is expected to reach 11,440 by 2030 (-11.2%), 10,051 by 2040 (-22.0%), and 8,715 by 2050 (-32.3%). A significant population decline is projected over the next three decades.
Aging Rate of Keisen
The aging rate (percentage of residents aged 65 and over) is 35.4% as of 2020 and is projected to rise to 41.4% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Keisen's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #983 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1143 out of 1903 nationwide.
- Population size: Ranked #1282 out of 1917 nationwide.
- Related: National rankings / All municipalities in Fukuoka
Earnings in Fukuoka (福岡県): Average salary in Fukuoka (福岡県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure