Okayama岡山県
Kasaoka 笠岡市
Data last updated:
Kasaoka, Okayama, Japan has a population of 41,221 (2025 national census). IPSS projections estimate 38,729 by 2030 and 25,357 by 2050 (a decrease of about 45.0% from 2020), with the share of residents aged 65+ rising from 38.3% in 2020 to 51.2%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025년실적
41,221명
2030년추계
38,729명
▼ -16.0%
2040년추계
31,762명
▼ -31.1%
2050년추계
25,357명
▼ -45.0%
Change vs. 2020 census
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Okayama (岡山県)의 다른 시구정촌
데이터 출처
- 일본 정부 통계 종합 포털(e-Stat)（https://www.e-stat.go.jp/）
- 국립사회보장・인구문제연구소 「일본의 지역별 장래추계인구(레이와 5년 추계)」
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Kasaoka 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 | 61,917 | ▲ +34.3% | Census |
| 1985 | 60,598 | ▲ +31.5% | Census |
| 1990 | 59,619 | ▲ +29.4% | Census |
| 1995 | 60,478 | ▲ +31.2% | Census |
| 2000 | 59,300 | ▲ +28.7% | Census |
| 2005 | 57,272 | ▲ +24.3% | Census |
| 2010 | 54,225 | ▲ +17.7% | Census |
| 2015 | 50,568 | ▲ +9.7% | Census |
| 2020 | 46,088 | — | Census |
| 2025 | 41,221 | ▼ -10.6% | Census |
| 2030 | 38,729 | ▼ -16.0% | Projection |
| 2035 | 35,203 | ▼ -23.6% | Projection |
| 2040 | 31,762 | ▼ -31.1% | Projection |
| 2045 | 28,447 | ▼ -38.3% | Projection |
| 2050 | 25,357 | ▼ -45.0% | Projection |
About Kasaoka
Overview
Kasaoka (笠岡市) is a municipality in Okayama, Japan, with a population of 41,221 as of 2025.
Population Projection of Kasaoka
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kasaoka's population is expected to reach 38,729 by 2030 (-16.0%), 31,762 by 2040 (-31.1%), and 25,357 by 2050 (-45.0%). A significant population decline is projected over the next three decades.
Aging Rate of Kasaoka
The aging rate (percentage of residents aged 65 and over) is 38.3% as of 2020 and is projected to rise to 51.2% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Kasaoka is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #531 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #488 out of 1903 nationwide.
- Population size: Ranked #766 out of 1917 nationwide.
- Related: National rankings / All municipalities in Okayama
Okayama (岡山県)의 소득 수준: Okayama (岡山県)의 평균 연봉(연령·성별·기업 규모별)jpsalary / 후생노동성 임금구조 기본통계조사