Oita大分県
Saiki 佐伯市
Data last updated:
Saiki, Oita, Japan has a population of 60,646 (2025 national census). IPSS projections estimate 55,139 by 2030 and 35,779 by 2050 (a decrease of about 46.5% from 2020), with the share of residents aged 65+ rising from 41.2% in 2020 to 52.7%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025년
(실적)
60,646명
2030년
(추계)
55,139명
▼ -17.5%
2040년
(추계)
44,869명
▼ -32.9%
2050년
(추계)
35,779명
▼ -46.5%
Change vs. 2020 census
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Oita (大分県)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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Saiki 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 | 96,534 | ▲ +44.4% | Census |
| 1985 | 95,907 | ▲ +43.5% | Census |
| 1990 | 91,217 | ▲ +36.4% | Census |
| 1995 | 88,116 | ▲ +31.8% | Census |
| 2000 | 84,449 | ▲ +26.3% | Census |
| 2005 | 80,297 | ▲ +20.1% | Census |
| 2010 | 76,951 | ▲ +15.1% | Census |
| 2015 | 72,211 | ▲ +8.0% | Census |
| 2020 | 66,851 | — | Census |
| 2025 | 60,646 | ▼ -9.3% | Census |
| 2030 | 55,139 | ▼ -17.5% | Projection |
| 2035 | 49,830 | ▼ -25.5% | Projection |
| 2040 | 44,869 | ▼ -32.9% | Projection |
| 2045 | 40,173 | ▼ -39.9% | Projection |
| 2050 | 35,779 | ▼ -46.5% | Projection |
About Saiki
Overview
Saiki (佐伯市) is a municipality in Oita, Japan, with a population of 60,646 as of 2025.
Population Projection of Saiki
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Saiki's population is expected to reach 55,139 by 2030 (-17.5%), 44,869 by 2040 (-32.9%), and 35,779 by 2050 (-46.5%). A significant population decline is projected over the next three decades.
Aging Rate of Saiki
The aging rate (percentage of residents aged 65 and over) is 41.2% as of 2020 and is projected to rise to 52.7% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Saiki is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #471 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #387 out of 1903 nationwide.
- Population size: Ranked #597 out of 1917 nationwide.
- Related: National rankings / All municipalities in Oita
Oita (大分県)의 소득 수준: Oita (大分県)의 평균 연봉(연령·성별·기업 규모별)jpsalary / 후생노동성 임금구조 기본통계조사