Nagano長野県
Karuizawa 軽井沢町
Data last updated:
Karuizawa, Nagano, Japan has a population of 18,483 (2025 national census). IPSS projections estimate 19,429 by 2030 and 17,958 by 2050 (a decrease of about 6.4% from 2020), with the share of residents aged 65+ rising from 33.3% in 2020 to 46.8%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
18,483
2030
(Projection)
19,429
▲ +1.3%
2040
(Projection)
18,754
▼ -2.3%
2050
(Projection)
17,958
▼ -6.4%
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.
Karuizawa 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 | 14,195 | ▼ -26.0% | Census |
| 1985 | 15,051 | ▼ -21.6% | Census |
| 1990 | 15,464 | ▼ -19.4% | Census |
| 1995 | 15,345 | ▼ -20.0% | Census |
| 2000 | 16,181 | ▼ -15.7% | Census |
| 2005 | 17,144 | ▼ -10.7% | Census |
| 2010 | 19,018 | ▼ -0.9% | Census |
| 2015 | 18,994 | ▼ -1.0% | Census |
| 2020 | 19,188 | — | Census |
| 2025 | 18,483 | ▼ -3.7% | Census |
| 2030 | 19,429 | ▲ +1.3% | Projection |
| 2035 | 19,156 | ▼ -0.2% | Projection |
| 2040 | 18,754 | ▼ -2.3% | Projection |
| 2045 | 18,367 | ▼ -4.3% | Projection |
| 2050 | 17,958 | ▼ -6.4% | Projection |
About Karuizawa
Overview
Karuizawa (軽井沢町) is a municipality in Nagano, Japan, with a population of 18,483 as of 2025.
Population Projection of Karuizawa
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Karuizawa's population is expected to reach 19,429 by 2030 (+1.3%), 18,754 by 2040 (-2.3%), and 17,958 by 2050 (-6.4%). A modest population change is expected.
Aging Rate of Karuizawa
The aging rate (percentage of residents aged 65 and over) is 33.3% as of 2020 and is projected to rise to 46.8% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Karuizawa's demographic trajectory is similar to the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1686 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #765 out of 1903 nationwide.
- Population size: Ranked #1098 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