Shimane島根県
Iinan 飯南町
Data last updated:
Iinan, Shimane, Japan has a population of 4,125 (2025 national census). IPSS projections estimate 3,791 by 2030 and 2,576 by 2050 (a decrease of about 43.7% from 2020), with the share of residents aged 65+ rising from 46.2% in 2020 to 47.3%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025Census
4,125
2030Projection
3,791
▼ -17.2%
2040Projection
3,149
▼ -31.2%
2050Projection
2,576
▼ -43.7%
Change vs. 2020 census
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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.
Iinan 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 | 7,771 | ▲ +69.8% | Census |
| 1985 | 7,650 | ▲ +67.1% | Census |
| 1990 | 7,331 | ▲ +60.2% | Census |
| 1995 | 6,893 | ▲ +50.6% | Census |
| 2000 | 6,541 | ▲ +42.9% | Census |
| 2005 | 5,979 | ▲ +30.6% | Census |
| 2010 | 5,534 | ▲ +20.9% | Census |
| 2015 | 5,031 | ▲ +9.9% | Census |
| 2020 | 4,577 | — | Census |
| 2025 | 4,125 | ▼ -9.9% | Census |
| 2030 | 3,791 | ▼ -17.2% | Projection |
| 2035 | 3,463 | ▼ -24.3% | Projection |
| 2040 | 3,149 | ▼ -31.2% | Projection |
| 2045 | 2,855 | ▼ -37.6% | Projection |
| 2050 | 2,576 | ▼ -43.7% | Projection |
About Iinan
Overview
Iinan (飯南町) is a municipality in Shimane, Japan, with a population of 4,125 as of 2025.
Population Projection of Iinan
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Iinan's population is expected to reach 3,791 by 2030 (-17.2%), 3,149 by 2040 (-31.2%), and 2,576 by 2050 (-43.7%). A significant population decline is projected over the next three decades.
Aging Rate of Iinan
The aging rate (percentage of residents aged 65 and over) is 46.2% as of 2020 and is projected to rise to 47.3% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Iinan is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #578 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #733 out of 1903 nationwide.
- Population size: Ranked #1652 out of 1917 nationwide.
- Related: National rankings / All municipalities in Shimane
Earnings in Shimane (島根県): Average salary in Shimane (島根県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure