Tokushima徳島県
Ishii 石井町
Data last updated:
Ishii, Tokushima, Japan has a population of 23,620 (2025 national census). IPSS projections estimate 23,035 by 2030 and 18,434 by 2050 (a decrease of about 25.8% from 2020), with the share of residents aged 65+ rising from 33.1% in 2020 to 42.5%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
23,620
2030
(Projection)
23,035
▼ -7.2%
2040
(Projection)
20,818
▼ -16.2%
2050
(Projection)
18,434
▼ -25.8%
Change vs. 2020 census
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Other municipalities in Tokushima (徳島県)
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.
Ishii 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 | 24,434 | ▼ -1.6% | Census |
| 1985 | 25,071 | ▲ +1.0% | Census |
| 1990 | 25,207 | ▲ +1.5% | Census |
| 1995 | 25,436 | ▲ +2.4% | Census |
| 2000 | 26,023 | ▲ +4.8% | Census |
| 2005 | 26,068 | ▲ +5.0% | Census |
| 2010 | 25,954 | ▲ +4.5% | Census |
| 2015 | 25,590 | ▲ +3.0% | Census |
| 2020 | 24,833 | — | Census |
| 2025 | 23,620 | ▼ -4.9% | Census |
| 2030 | 23,035 | ▼ -7.2% | Projection |
| 2035 | 21,965 | ▼ -11.5% | Projection |
| 2040 | 20,818 | ▼ -16.2% | Projection |
| 2045 | 19,624 | ▼ -21.0% | Projection |
| 2050 | 18,434 | ▼ -25.8% | Projection |
About Ishii
Overview
Ishii (石井町) is a municipality in Tokushima, Japan, with a population of 23,620 as of 2025.
Population Projection of Ishii
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Ishii's population is expected to reach 23,035 by 2030 (-7.2%), 20,818 by 2040 (-16.2%), and 18,434 by 2050 (-25.8%). A significant population decline is projected over the next three decades.
Aging Rate of Ishii
The aging rate (percentage of residents aged 65 and over) is 33.1% as of 2020 and is projected to rise to 42.5% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Ishii's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1184 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1058 out of 1903 nationwide.
- Population size: Ranked #1015 out of 1917 nationwide.
- Related: National rankings / All municipalities in Tokushima
Earnings in Tokushima (徳島県): Average salary in Tokushima (徳島県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure