Fukuoka福岡県
Kasuga 春日市
Data last updated:
Kasuga, Fukuoka, Japan has a population of 108,955 (2025 national census). IPSS projections estimate 108,737 by 2030 and 99,936 by 2050 (a decrease of about 10.0% from 2020), with the share of residents aged 65+ rising from 22.4% in 2020 to 32.9%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
108,955
2030
(Projection)
108,737
▼ -2.1%
2040
(Projection)
104,862
▼ -5.5%
2050
(Projection)
99,936
▼ -10.0%
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.
Kasuga 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 | 65,838 | ▼ -40.7% | Census |
| 1985 | 75,555 | ▼ -31.9% | Census |
| 1990 | 88,699 | ▼ -20.1% | Census |
| 1995 | 99,206 | ▼ -10.6% | Census |
| 2000 | 105,219 | ▼ -5.2% | Census |
| 2005 | 108,402 | ▼ -2.4% | Census |
| 2010 | 106,780 | ▼ -3.8% | Census |
| 2015 | 110,743 | ▼ -0.3% | Census |
| 2020 | 111,023 | — | Census |
| 2025 | 108,955 | ▼ -1.9% | Census |
| 2030 | 108,737 | ▼ -2.1% | Projection |
| 2035 | 106,914 | ▼ -3.7% | Projection |
| 2040 | 104,862 | ▼ -5.5% | Projection |
| 2045 | 102,552 | ▼ -7.6% | Projection |
| 2050 | 99,936 | ▼ -10.0% | Projection |
About Kasuga
Overview
Kasuga (春日市) is a municipality in Fukuoka, Japan, with a population of 108,955 as of 2025.
Population Projection of Kasuga
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kasuga's population is expected to reach 108,737 by 2030 (-2.1%), 104,862 by 2040 (-5.5%), and 99,936 by 2050 (-10.0%). A modest population change is expected.
Aging Rate of Kasuga
The aging rate (percentage of residents aged 65 and over) is 22.4% as of 2020 and is projected to rise to 32.9% by 2050. The aging rate will remain below the most severe Japanese averages.
National Comparison
Kasuga's demographic trajectory is similar to the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1620 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1740 out of 1903 nationwide.
- Population size: Ranked #388 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