Gifu岐阜県
Seki 関市
Data last updated:
Seki, Gifu, Japan has a population of 80,797 (2025 national census). IPSS projections estimate 77,711 by 2030 and 59,419 by 2050 (a decrease of about 30.3% from 2020), with the share of residents aged 65+ rising from 30.6% in 2020 to 43.6%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
80,797
2030
(Projection)
77,711
▼ -8.9%
2040
(Projection)
68,803
▼ -19.3%
2050
(Projection)
59,419
▼ -30.3%
Change vs. 2020 census
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Other municipalities in Gifu (岐阜県)
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.
Seki 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 | 78,529 | ▼ -7.9% | Census |
| 1985 | 83,363 | ▼ -2.3% | Census |
| 1990 | 87,117 | ▲ +2.2% | Census |
| 1995 | 90,147 | ▲ +5.7% | Census |
| 2000 | 92,061 | ▲ +7.9% | Census |
| 2005 | 92,597 | ▲ +8.6% | Census |
| 2010 | 91,418 | ▲ +7.2% | Census |
| 2015 | 89,153 | ▲ +4.5% | Census |
| 2020 | 85,283 | — | Census |
| 2025 | 80,797 | ▼ -5.3% | Census |
| 2030 | 77,711 | ▼ -8.9% | Projection |
| 2035 | 73,410 | ▼ -13.9% | Projection |
| 2040 | 68,803 | ▼ -19.3% | Projection |
| 2045 | 64,065 | ▼ -24.9% | Projection |
| 2050 | 59,419 | ▼ -30.3% | Projection |
About Seki
Overview
Seki (関市) is a municipality in Gifu, Japan, with a population of 80,797 as of 2025.
Population Projection of Seki
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Seki's population is expected to reach 77,711 by 2030 (-8.9%), 68,803 by 2040 (-19.3%), and 59,419 by 2050 (-30.3%). A significant population decline is projected over the next three decades.
Aging Rate of Seki
The aging rate (percentage of residents aged 65 and over) is 30.6% as of 2020 and is projected to rise to 43.6% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Seki's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1049 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #976 out of 1903 nationwide.
- Population size: Ranked #492 out of 1917 nationwide.
- Related: National rankings / All municipalities in Gifu
Earnings in Gifu (岐阜県): Average salary in Gifu (岐阜県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure