Iwate岩手県
Ootsuchi 大槌町
Data last updated:
Ootsuchi, Iwate, Japan has a population of 9,850 (2025 national census). IPSS projections estimate 8,922 by 2030 and 5,394 by 2050 (a decrease of about 51.0% from 2020), with the share of residents aged 65+ rising from 38.2% in 2020 to 48.5%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
9,850
2030
(Projection)
8,922
▼ -18.9%
2040
(Projection)
7,035
▼ -36.1%
2050
(Projection)
5,394
▼ -51.0%
Change vs. 2020 census
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Other municipalities in Iwate (岩手県)
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.
Ootsuchi 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 | 21,292 | ▲ +93.5% | Census |
| 1985 | 20,258 | ▲ +84.1% | Census |
| 1990 | 19,074 | ▲ +73.3% | Census |
| 1995 | 18,301 | ▲ +66.3% | Census |
| 2000 | 17,480 | ▲ +58.9% | Census |
| 2005 | 16,516 | ▲ +50.1% | Census |
| 2010 | 15,276 | ▲ +38.8% | Census |
| 2015 | 11,759 | ▲ +6.9% | Census |
| 2020 | 11,004 | — | Census |
| 2025 | 9,850 | ▼ -10.5% | Census |
| 2030 | 8,922 | ▼ -18.9% | Projection |
| 2035 | 7,953 | ▼ -27.7% | Projection |
| 2040 | 7,035 | ▼ -36.1% | Projection |
| 2045 | 6,179 | ▼ -43.8% | Projection |
| 2050 | 5,394 | ▼ -51.0% | Projection |
About Ootsuchi
Overview
Ootsuchi (大槌町) is a municipality in Iwate, Japan, with a population of 9,850 as of 2025.
Population Projection of Ootsuchi
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Ootsuchi's population is expected to reach 8,922 by 2030 (-18.9%), 7,035 by 2040 (-36.1%), and 5,394 by 2050 (-51.0%). The town is projected to lose more than half its population over 30 years.
Aging Rate of Ootsuchi
The aging rate (percentage of residents aged 65 and over) is 38.2% as of 2020 and is projected to rise to 48.5% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Ootsuchi is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #299 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #660 out of 1903 nationwide.
- Population size: Ranked #1357 out of 1917 nationwide.
- Related: National rankings / All municipalities in Iwate
Earnings in Iwate (岩手県): Average salary in Iwate (岩手県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure