Tochigi栃木県
Ichikai 市貝町
Data last updated:
Ichikai, Tochigi, Japan has a population of 10,514 (2025 national census). IPSS projections estimate 10,120 by 2030 and 7,681 by 2050 (a decrease of about 31.8% from 2020), with the share of residents aged 65+ rising from 29.7% in 2020 to 46.5%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025Census
10,514
2030Projection
10,120
▼ -10.1%
2040Projection
8,961
▼ -20.4%
2050Projection
7,681
▼ -31.8%
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.
Ichikai 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 | 10,459 | ▼ -7.1% | Census |
| 1985 | 10,821 | ▼ -3.9% | Census |
| 1990 | 11,481 | ▲ +1.9% | Census |
| 1995 | 12,546 | ▲ +11.4% | Census |
| 2000 | 12,441 | ▲ +10.5% | Census |
| 2005 | 12,401 | ▲ +10.1% | Census |
| 2010 | 12,094 | ▲ +7.4% | Census |
| 2015 | 11,720 | ▲ +4.1% | Census |
| 2020 | 11,262 | — | Census |
| 2025 | 10,514 | ▼ -6.6% | Census |
| 2030 | 10,120 | ▼ -10.1% | Projection |
| 2035 | 9,557 | ▼ -15.1% | Projection |
| 2040 | 8,961 | ▼ -20.4% | Projection |
| 2045 | 8,332 | ▼ -26.0% | Projection |
| 2050 | 7,681 | ▼ -31.8% | Projection |
About Ichikai
Overview
Ichikai (市貝町) is a municipality in Tochigi, Japan, with a population of 10,514 as of 2025.
Population Projection of Ichikai
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Ichikai's population is expected to reach 10,120 by 2030 (-10.1%), 8,961 by 2040 (-20.4%), and 7,681 by 2050 (-31.8%). A significant population decline is projected over the next three decades.
Aging Rate of Ichikai
The aging rate (percentage of residents aged 65 and over) is 29.7% as of 2020 and is projected to rise to 46.5% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Ichikai's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #998 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #788 out of 1903 nationwide.
- Population size: Ranked #1327 out of 1917 nationwide.
- Related: National rankings / All municipalities in Tochigi
Earnings in Tochigi (栃木県): Average salary in Tochigi (栃木県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure