Aomori青森県
Sai 佐井村
Data last updated:
Sai, Aomori, Japan has a population of 1,467 (2025 national census). IPSS projections estimate 1,306 by 2030 and 607 by 2050 (a decrease of about 66.1% from 2020), with the share of residents aged 65+ rising from 48.1% in 2020 to 68.9%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025년
(실적)
1,467명
2030년
(추계)
1,306명
▼ -27.0%
2040년
(추계)
917명
▼ -48.7%
2050년
(추계)
607명
▼ -66.1%
Change vs. 2020 census
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Aomori (青森県)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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Sai 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 | 4,174 | ▲ +133.4% | Census |
| 1985 | 3,634 | ▲ +103.2% | Census |
| 1990 | 3,348 | ▲ +87.2% | Census |
| 1995 | 3,173 | ▲ +77.5% | Census |
| 2000 | 3,010 | ▲ +68.3% | Census |
| 2005 | 2,843 | ▲ +59.0% | Census |
| 2010 | 2,422 | ▲ +35.5% | Census |
| 2015 | 2,148 | ▲ +20.1% | Census |
| 2020 | 1,788 | — | Census |
| 2025 | 1,467 | ▼ -18.0% | Census |
| 2030 | 1,306 | ▼ -27.0% | Projection |
| 2035 | 1,101 | ▼ -38.4% | Projection |
| 2040 | 917 | ▼ -48.7% | Projection |
| 2045 | 748 | ▼ -58.2% | Projection |
| 2050 | 607 | ▼ -66.1% | Projection |
About Sai
Overview
Sai (佐井村) is a municipality in Aomori, Japan, with a population of 1,467 as of 2025.
Population Projection of Sai
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Sai's population is expected to reach 1,306 by 2030 (-27.0%), 917 by 2040 (-48.7%), and 607 by 2050 (-66.1%). The town is projected to lose more than half its population over 30 years.
Aging Rate of Sai
The aging rate (percentage of residents aged 65 and over) is 48.1% as of 2020 and is projected to rise to 68.9% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Sai is among the most rapidly declining municipalities in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #23 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #11 out of 1903 nationwide.
- Population size: Ranked #1842 out of 1917 nationwide.
- Related: National rankings / All municipalities in Aomori
Aomori (青森県)의 소득 수준: Aomori (青森県)의 평균 연봉(연령·성별·기업 규모별)jpsalary / 후생노동성 임금구조 기본통계조사