Aichi愛知県
Ooharu 大治町
Data last updated:
Ooharu, Aichi, Japan has a population of 32,408 (2025 national census). IPSS projections estimate 32,886 by 2030 and 31,143 by 2050 (a decrease of about 3.9% from 2020), with the share of residents aged 65+ rising from 21.3% in 2020 to 33.4%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025Census
32,408
2030Projection
32,886
▲ +1.5%
2040Projection
32,306
▼ -0.3%
2050Projection
31,143
▼ -3.9%
Change vs. 2020 census
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Other municipalities in Aichi (愛知県)
Data Sources
- Portal Site of Official Statistics of Japan (e-Stat)（https://www.e-stat.go.jp/）
- National Institute of Population and Social Security Research (IPSS), Regional Population Projections (2023 ed.)
* This service uses the e-Stat API but its content is not guaranteed by the Japanese government.
Ooharu 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 | 19,939 | ▼ -38.5% | Census |
| 1985 | 21,171 | ▼ -34.7% | Census |
| 1990 | 22,598 | ▼ -30.3% | Census |
| 1995 | 24,724 | ▼ -23.7% | Census |
| 2000 | 27,073 | ▼ -16.4% | Census |
| 2005 | 28,501 | ▼ -12.0% | Census |
| 2010 | 29,891 | ▼ -7.7% | Census |
| 2015 | 30,990 | ▼ -4.3% | Census |
| 2020 | 32,399 | — | Census |
| 2025 | 32,408 | → 0.0% | Census |
| 2030 | 32,886 | ▲ +1.5% | Projection |
| 2035 | 32,691 | ▲ +0.9% | Projection |
| 2040 | 32,306 | ▼ -0.3% | Projection |
| 2045 | 31,798 | ▼ -1.9% | Projection |
| 2050 | 31,143 | ▼ -3.9% | Projection |
About Ooharu
Overview
Ooharu (大治町) is a municipality in Aichi, Japan, with a population of 32,408 as of 2025.
Population Projection of Ooharu
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Ooharu's population is expected to reach 32,886 by 2030 (+1.5%), 32,306 by 2040 (-0.3%), and 31,143 by 2050 (-3.9%). A modest population change is expected.
Aging Rate of Ooharu
The aging rate (percentage of residents aged 65 and over) is 21.3% as of 2020 and is projected to rise to 33.4% by 2050. The aging rate will remain below the most severe Japanese averages.
National Comparison
Ooharu's demographic trajectory is similar to the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1739 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1709 out of 1903 nationwide.
- Population size: Ranked #862 out of 1917 nationwide.
- Related: National rankings / All municipalities in Aichi
Earnings in Aichi (愛知県): Average salary in Aichi (愛知県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure