Nagano長野県
Ookuwa 大桑村
Data last updated:
Ookuwa, Nagano, Japan has a population of 3,004 (2025 national census). IPSS projections estimate 2,791 by 2030 and 1,747 by 2050 (a decrease of about 49.2% from 2020), with the share of residents aged 65+ rising from 43.1% in 2020 to 47.8%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
3,004
2030
(Projection)
2,791
▼ -18.8%
2040
(Projection)
2,223
▼ -35.4%
2050
(Projection)
1,747
▼ -49.2%
Change vs. 2020 census
Enter your age
See the population of 大桑村 when you turn 50, 60, 70 and 80.
Other municipalities in Nagano (長野県)
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.
Ookuwa 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 | 5,637 | ▲ +63.9% | Census |
| 1985 | 5,588 | ▲ +62.5% | Census |
| 1990 | 5,160 | ▲ +50.0% | Census |
| 1995 | 5,015 | ▲ +45.8% | Census |
| 2000 | 4,770 | ▲ +38.7% | Census |
| 2005 | 4,457 | ▲ +29.6% | Census |
| 2010 | 4,145 | ▲ +20.5% | Census |
| 2015 | 3,825 | ▲ +11.2% | Census |
| 2020 | 3,439 | — | Census |
| 2025 | 3,004 | ▼ -12.6% | Census |
| 2030 | 2,791 | ▼ -18.8% | Projection |
| 2035 | 2,496 | ▼ -27.4% | Projection |
| 2040 | 2,223 | ▼ -35.4% | Projection |
| 2045 | 1,974 | ▼ -42.6% | Projection |
| 2050 | 1,747 | ▼ -49.2% | Projection |
About Ookuwa
Overview
Ookuwa (大桑村) is a municipality in Nagano, Japan, with a population of 3,004 as of 2025.
Population Projection of Ookuwa
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Ookuwa's population is expected to reach 2,791 by 2030 (-18.8%), 2,223 by 2040 (-35.4%), and 1,747 by 2050 (-49.2%). A significant population decline is projected over the next three decades.
Aging Rate of Ookuwa
The aging rate (percentage of residents aged 65 and over) is 43.1% as of 2020 and is projected to rise to 47.8% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Ookuwa is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #370 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #698 out of 1903 nationwide.
- Population size: Ranked #1724 out of 1917 nationwide.
- Related: National rankings / All municipalities in Nagano
Earnings in Nagano (長野県): Average salary in Nagano (長野県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure