Shizuoka静岡県
Izunokuni 伊豆の国市
Data last updated:
Izunokuni, Shizuoka, Japan has a population of 44,124 (2025 national census). IPSS projections estimate 42,372 by 2030 and 33,651 by 2050 (a decrease of about 28.1% from 2020), with the share of residents aged 65+ rising from 33.8% in 2020 to 44.0%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
44,124
2030
(Projection)
42,372
▼ -9.5%
2040
(Projection)
37,973
▼ -18.9%
2050
(Projection)
33,651
▼ -28.1%
Change vs. 2020 census
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Other municipalities in Shizuoka (静岡県)
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.
Izunokuni 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 | 44,046 | ▼ -5.9% | Census |
| 1985 | 46,413 | ▼ -0.8% | Census |
| 1990 | 48,369 | ▲ +3.3% | Census |
| 1995 | 50,328 | ▲ +7.5% | Census |
| 2000 | 50,062 | ▲ +7.0% | Census |
| 2005 | 50,011 | ▲ +6.9% | Census |
| 2010 | 49,269 | ▲ +5.3% | Census |
| 2015 | 48,152 | ▲ +2.9% | Census |
| 2020 | 46,804 | — | Census |
| 2025 | 44,124 | ▼ -5.7% | Census |
| 2030 | 42,372 | ▼ -9.5% | Projection |
| 2035 | 40,189 | ▼ -14.1% | Projection |
| 2040 | 37,973 | ▼ -18.9% | Projection |
| 2045 | 35,780 | ▼ -23.6% | Projection |
| 2050 | 33,651 | ▼ -28.1% | Projection |
About Izunokuni
Overview
Izunokuni (伊豆の国市) is a municipality in Shizuoka, Japan, with a population of 44,124 as of 2025.
Population Projection of Izunokuni
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Izunokuni's population is expected to reach 42,372 by 2030 (-9.5%), 37,973 by 2040 (-18.9%), and 33,651 by 2050 (-28.1%). A significant population decline is projected over the next three decades.
Aging Rate of Izunokuni
The aging rate (percentage of residents aged 65 and over) is 33.8% as of 2020 and is projected to rise to 44.0% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Izunokuni's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1117 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #949 out of 1903 nationwide.
- Population size: Ranked #735 out of 1917 nationwide.
- Related: National rankings / All municipalities in Shizuoka
Earnings in Shizuoka (静岡県): Average salary in Shizuoka (静岡県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure