Fukuoka福岡県
Kasuya 粕屋町
Data last updated:
Kasuya, Fukuoka, Japan has a population of 48,490 (2025 national census). IPSS projections estimate 50,747 by 2030 and 52,690 by 2050 (an increase of about 9.3% from 2020), with the share of residents aged 65+ rising from 17.9% in 2020 to 26.8%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
48,490
2030
(Projection)
50,747
▲ +5.3%
2040
(Projection)
52,525
▲ +9.0%
2050
(Projection)
52,690
▲ +9.3%
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.
Kasuya 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 | 26,810 | ▼ -44.4% | Census |
| 1985 | 29,027 | ▼ -39.8% | Census |
| 1990 | 29,697 | ▼ -38.4% | Census |
| 1995 | 31,504 | ▼ -34.6% | Census |
| 2000 | 34,811 | ▼ -27.8% | Census |
| 2005 | 37,685 | ▼ -21.8% | Census |
| 2010 | 41,997 | ▼ -12.9% | Census |
| 2015 | 45,360 | ▼ -5.9% | Census |
| 2020 | 48,190 | — | Census |
| 2025 | 48,490 | ▲ +0.6% | Census |
| 2030 | 50,747 | ▲ +5.3% | Projection |
| 2035 | 51,826 | ▲ +7.5% | Projection |
| 2040 | 52,525 | ▲ +9.0% | Projection |
| 2045 | 52,834 | ▲ +9.6% | Projection |
| 2050 | 52,690 | ▲ +9.3% | Projection |
About Kasuya
Overview
Kasuya (粕屋町) is a municipality in Fukuoka, Japan, with a population of 48,490 as of 2025.
Population Projection of Kasuya
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kasuya's population is expected to reach 50,747 by 2030 (+5.3%), 52,525 by 2040 (+9.0%), and 52,690 by 2050 (+9.3%). Kasuya is among the rare Japanese municipalities projected to see population growth.
Aging Rate of Kasuya
The aging rate (percentage of residents aged 65 and over) is 17.9% as of 2020 and is projected to rise to 26.8% by 2050. The aging rate will remain below the most severe Japanese averages.
National Comparison
Kasuya's demographic trajectory is similar to the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1885 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1875 out of 1903 nationwide.
- Population size: Ranked #688 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