Nagano長野県
Ogawa 小川村
Data last updated:
Ogawa, Nagano, Japan has a population of 2,001 (2025 national census). IPSS projections estimate 1,700 by 2030 and 991 by 2050 (a decrease of about 55.3% from 2020), with the share of residents aged 65+ rising from 45.9% in 2020 to 57.3%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
2,001
2030
(Projection)
1,700
▼ -23.3%
2040
(Projection)
1,309
▼ -40.9%
2050
(Projection)
991
▼ -55.3%
Change vs. 2020 census
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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.
Ogawa 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 | 5,132 | ▲ +131.7% | Census |
| 1985 | 4,560 | ▲ +105.9% | Census |
| 1990 | 4,133 | ▲ +86.6% | Census |
| 1995 | 3,888 | ▲ +75.5% | Census |
| 2000 | 3,620 | ▲ +63.4% | Census |
| 2005 | 3,371 | ▲ +52.2% | Census |
| 2010 | 3,041 | ▲ +37.3% | Census |
| 2015 | 2,665 | ▲ +20.3% | Census |
| 2020 | 2,215 | — | Census |
| 2025 | 2,001 | ▼ -9.7% | Census |
| 2030 | 1,700 | ▼ -23.3% | Projection |
| 2035 | 1,496 | ▼ -32.5% | Projection |
| 2040 | 1,309 | ▼ -40.9% | Projection |
| 2045 | 1,141 | ▼ -48.5% | Projection |
| 2050 | 991 | ▼ -55.3% | Projection |
About Ogawa
Overview
Ogawa (小川村) is a municipality in Nagano, Japan, with a population of 2,001 as of 2025.
Population Projection of Ogawa
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Ogawa's population is expected to reach 1,700 by 2030 (-23.3%), 1,309 by 2040 (-40.9%), and 991 by 2050 (-55.3%). The town is projected to lose more than half its population over 30 years.
Aging Rate of Ogawa
The aging rate (percentage of residents aged 65 and over) is 45.9% as of 2020 and is projected to rise to 57.3% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Ogawa is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #163 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #188 out of 1903 nationwide.
- Population size: Ranked #1810 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