Oita大分県
Kunisaki 国東市
Data last updated:
Kunisaki, Oita, Japan has a population of 23,658 (2025 national census). IPSS projections estimate 21,702 by 2030 and 14,119 by 2050 (a decrease of about 46.2% from 2020), with the share of residents aged 65+ rising from 43.2% in 2020 to 53.7%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
23,658
2030
(Projection)
21,702
▼ -17.3%
2040
(Projection)
17,733
▼ -32.4%
2050
(Projection)
14,119
▼ -46.2%
Change vs. 2020 census
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Other municipalities in Oita (大分県)
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.
Kunisaki 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 | 40,504 | ▲ +54.4% | Census |
| 1985 | 39,784 | ▲ +51.7% | Census |
| 1990 | 37,771 | ▲ +44.0% | Census |
| 1995 | 36,253 | ▲ +38.2% | Census |
| 2000 | 35,425 | ▲ +35.0% | Census |
| 2005 | 34,206 | ▲ +30.4% | Census |
| 2010 | 32,002 | ▲ +22.0% | Census |
| 2015 | 28,647 | ▲ +9.2% | Census |
| 2020 | 26,232 | — | Census |
| 2025 | 23,658 | ▼ -9.8% | Census |
| 2030 | 21,702 | ▼ -17.3% | Projection |
| 2035 | 19,657 | ▼ -25.1% | Projection |
| 2040 | 17,733 | ▼ -32.4% | Projection |
| 2045 | 15,859 | ▼ -39.5% | Projection |
| 2050 | 14,119 | ▼ -46.2% | Projection |
About Kunisaki
Overview
Kunisaki (国東市) is a municipality in Oita, Japan, with a population of 23,658 as of 2025.
Population Projection of Kunisaki
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kunisaki's population is expected to reach 21,702 by 2030 (-17.3%), 17,733 by 2040 (-32.4%), and 14,119 by 2050 (-46.2%). A significant population decline is projected over the next three decades.
Aging Rate of Kunisaki
The aging rate (percentage of residents aged 65 and over) is 43.2% as of 2020 and is projected to rise to 53.7% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Kunisaki is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #483 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #338 out of 1903 nationwide.
- Population size: Ranked #1013 out of 1917 nationwide.
- Related: National rankings / All municipalities in Oita
Earnings in Oita (大分県): Average salary in Oita (大分県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure