Ibaraki茨城県
Yachiyo 八千代町
Data last updated:
Yachiyo, Ibaraki, Japan has a population of 20,090 (2025 national census). IPSS projections estimate 18,830 by 2030 and 13,901 by 2050 (a decrease of about 33.9% from 2020), with the share of residents aged 65+ rising from 30.7% in 2020 to 42.3%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025Census
20,090
2030Projection
18,830
▼ -10.4%
2040Projection
16,429
▼ -21.9%
2050Projection
13,901
▼ -33.9%
Change vs. 2020 census
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Other municipalities in Ibaraki (茨城県)
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.
Yachiyo 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 | 22,845 | ▲ +8.7% | Census |
| 1985 | 24,029 | ▲ +14.3% | Census |
| 1990 | 24,351 | ▲ +15.8% | Census |
| 1995 | 25,008 | ▲ +18.9% | Census |
| 2000 | 24,352 | ▲ +15.8% | Census |
| 2005 | 23,609 | ▲ +12.3% | Census |
| 2010 | 23,106 | ▲ +9.9% | Census |
| 2015 | 22,021 | ▲ +4.7% | Census |
| 2020 | 21,026 | — | Census |
| 2025 | 20,090 | ▼ -4.5% | Census |
| 2030 | 18,830 | ▼ -10.4% | Projection |
| 2035 | 17,656 | ▼ -16.0% | Projection |
| 2040 | 16,429 | ▼ -21.9% | Projection |
| 2045 | 15,155 | ▼ -27.9% | Projection |
| 2050 | 13,901 | ▼ -33.9% | Projection |
About Yachiyo
Overview
Yachiyo (八千代町) is a municipality in Ibaraki, Japan, with a population of 20,090 as of 2025.
Population Projection of Yachiyo
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Yachiyo's population is expected to reach 18,830 by 2030 (-10.4%), 16,429 by 2040 (-21.9%), and 13,901 by 2050 (-33.9%). A significant population decline is projected over the next three decades.
Aging Rate of Yachiyo
The aging rate (percentage of residents aged 65 and over) is 30.7% as of 2020 and is projected to rise to 42.3% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Yachiyo's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #927 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1070 out of 1903 nationwide.
- Population size: Ranked #1075 out of 1917 nationwide.
- Related: National rankings / All municipalities in Ibaraki
Earnings in Ibaraki (茨城県): Average salary in Ibaraki (茨城県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure