Kochi高知県
Ootoyo 大豊町
Data last updated:
Ootoyo, Kochi, Japan has a population of 2,762 (2025 national census). IPSS projections estimate 2,297 by 2030 and 1,016 by 2050 (a decrease of about 68.8% from 2020), with the share of residents aged 65+ rising from 58.7% in 2020 to 66.1%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025년
(실적)
2,762명
2030년
(추계)
2,297명
▼ -29.4%
2040년
(추계)
1,558명
▼ -52.1%
2050년
(추계)
1,016명
▼ -68.8%
Change vs. 2020 census
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Kochi (高知県)의 다른 시구정촌
데이터 출처
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- 국립사회보장・인구문제연구소 「일본의 지역별 장래추계인구(레이와 5년 추계)」
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Ootoyo 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 | 9,411 | ▲ +189.4% | Census |
| 1985 | 8,830 | ▲ +171.5% | Census |
| 1990 | 7,760 | ▲ +138.6% | Census |
| 1995 | 6,979 | ▲ +114.6% | Census |
| 2000 | 6,378 | ▲ +96.1% | Census |
| 2005 | 5,492 | ▲ +68.9% | Census |
| 2010 | 4,719 | ▲ +45.1% | Census |
| 2015 | 3,962 | ▲ +21.8% | Census |
| 2020 | 3,252 | — | Census |
| 2025 | 2,762 | ▼ -15.1% | Census |
| 2030 | 2,297 | ▼ -29.4% | Projection |
| 2035 | 1,903 | ▼ -41.5% | Projection |
| 2040 | 1,558 | ▼ -52.1% | Projection |
| 2045 | 1,264 | ▼ -61.1% | Projection |
| 2050 | 1,016 | ▼ -68.8% | Projection |
About Ootoyo
Overview
Ootoyo (大豊町) is a municipality in Kochi, Japan, with a population of 2,762 as of 2025.
Population Projection of Ootoyo
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Ootoyo's population is expected to reach 2,297 by 2030 (-29.4%), 1,558 by 2040 (-52.1%), and 1,016 by 2050 (-68.8%). The town is projected to lose more than half its population over 30 years.
Aging Rate of Ootoyo
The aging rate (percentage of residents aged 65 and over) is 58.7% as of 2020 and is projected to rise to 66.1% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Ootoyo is among the most rapidly declining municipalities in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #15 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #28 out of 1903 nationwide.
- Population size: Ranked #1742 out of 1917 nationwide.
- Related: National rankings / All municipalities in Kochi
Kochi (高知県)의 소득 수준: Kochi (高知県)의 평균 연봉(연령·성별·기업 규모별)jpsalary / 후생노동성 임금구조 기본통계조사