Nagano長野県
Hiraya 平谷村
Data last updated:
Hiraya, Nagano, Japan has a population of 353 (2025 national census). IPSS projections estimate 273 by 2030 and 155 by 2050 (a decrease of about 59.9% from 2020), with the share of residents aged 65+ rising from 33.9% in 2020 to 45.2%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
353
2030
(Projection)
273
▼ -29.5%
2040
(Projection)
209
▼ -46.0%
2050
(Projection)
155
▼ -59.9%
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.
Hiraya 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 | 657 | ▲ +69.8% | Census |
| 1985 | 635 | ▲ +64.1% | Census |
| 1990 | 617 | ▲ +59.4% | Census |
| 1995 | 660 | ▲ +70.5% | Census |
| 2000 | 712 | ▲ +84.0% | Census |
| 2005 | 688 | ▲ +77.8% | Census |
| 2010 | 563 | ▲ +45.5% | Census |
| 2015 | 484 | ▲ +25.1% | Census |
| 2020 | 387 | — | Census |
| 2025 | 353 | ▼ -8.8% | Census |
| 2030 | 273 | ▼ -29.5% | Projection |
| 2035 | 241 | ▼ -37.7% | Projection |
| 2040 | 209 | ▼ -46.0% | Projection |
| 2045 | 175 | ▼ -54.8% | Projection |
| 2050 | 155 | ▼ -59.9% | Projection |
About Hiraya
Overview
Hiraya (平谷村) is a municipality in Nagano, Japan, with a population of 353 as of 2025.
Population Projection of Hiraya
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Hiraya's population is expected to reach 273 by 2030 (-29.5%), 209 by 2040 (-46.0%), and 155 by 2050 (-59.9%). The town is projected to lose more than half its population over 30 years.
Aging Rate of Hiraya
The aging rate (percentage of residents aged 65 and over) is 33.9% as of 2020 and is projected to rise to 45.2% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Hiraya is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #71 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #876 out of 1903 nationwide.
- Population size: Ranked #1909 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