Okayama岡山県
Akaiwa 赤磐市
Data last updated:
Akaiwa, Okayama, Japan has a population of 40,892 (2025 national census). IPSS projections estimate 40,250 by 2030 and 34,386 by 2050 (a decrease of about 19.4% from 2020), with the share of residents aged 65+ rising from 33.9% in 2020 to 39.5%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025년실적
40,892명
2030년추계
40,250명
▼ -5.7%
2040년추계
37,265명
▼ -12.6%
2050년추계
34,386명
▼ -19.4%
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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Akaiwa 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 | 37,007 | ▼ -13.3% | Census |
| 1985 | 40,005 | ▼ -6.2% | Census |
| 1990 | 41,016 | ▼ -3.9% | Census |
| 1995 | 43,011 | ▲ +0.8% | Census |
| 2000 | 43,813 | ▲ +2.7% | Census |
| 2005 | 43,913 | ▲ +2.9% | Census |
| 2010 | 43,458 | ▲ +1.9% | Census |
| 2015 | 43,214 | ▲ +1.3% | Census |
| 2020 | 42,661 | — | Census |
| 2025 | 40,892 | ▼ -4.1% | Census |
| 2030 | 40,250 | ▼ -5.7% | Projection |
| 2035 | 38,792 | ▼ -9.1% | Projection |
| 2040 | 37,265 | ▼ -12.6% | Projection |
| 2045 | 35,791 | ▼ -16.1% | Projection |
| 2050 | 34,386 | ▼ -19.4% | Projection |
About Akaiwa
Overview
Akaiwa (赤磐市) is a municipality in Okayama, Japan, with a population of 40,892 as of 2025.
Population Projection of Akaiwa
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Akaiwa's population is expected to reach 40,250 by 2030 (-5.7%), 37,265 by 2040 (-12.6%), and 34,386 by 2050 (-19.4%). A modest population change is expected.
Aging Rate of Akaiwa
The aging rate (percentage of residents aged 65 and over) is 33.9% as of 2020 and is projected to rise to 39.5% by 2050. The aging rate will remain below the most severe Japanese averages.
National Comparison
Akaiwa's demographic trajectory is similar to the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1370 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1305 out of 1903 nationwide.
- Population size: Ranked #771 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