Oita大分県
Kokonoe 九重町
Data last updated:
Kokonoe, Oita, Japan has a population of 7,501 (2025 national census). IPSS projections estimate 6,867 by 2030 and 4,159 by 2050 (a decrease of about 51.3% from 2020), with the share of residents aged 65+ rising from 45.2% in 2020 to 53.3%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
7,501
2030
(Projection)
6,867
▼ -19.6%
2040
(Projection)
5,417
▼ -36.6%
2050
(Projection)
4,159
▼ -51.3%
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.
Kokonoe 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 | 14,407 | ▲ +68.7% | Census |
| 1985 | 13,672 | ▲ +60.1% | Census |
| 1990 | 12,848 | ▲ +50.4% | Census |
| 1995 | 12,022 | ▲ +40.8% | Census |
| 2000 | 11,566 | ▲ +35.4% | Census |
| 2005 | 11,108 | ▲ +30.1% | Census |
| 2010 | 10,421 | ▲ +22.0% | Census |
| 2015 | 9,645 | ▲ +12.9% | Census |
| 2020 | 8,541 | — | Census |
| 2025 | 7,501 | ▼ -12.2% | Census |
| 2030 | 6,867 | ▼ -19.6% | Projection |
| 2035 | 6,109 | ▼ -28.5% | Projection |
| 2040 | 5,417 | ▼ -36.6% | Projection |
| 2045 | 4,758 | ▼ -44.3% | Projection |
| 2050 | 4,159 | ▼ -51.3% | Projection |
About Kokonoe
Overview
Kokonoe (九重町) is a municipality in Oita, Japan, with a population of 7,501 as of 2025.
Population Projection of Kokonoe
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kokonoe's population is expected to reach 6,867 by 2030 (-19.6%), 5,417 by 2040 (-36.6%), and 4,159 by 2050 (-51.3%). The town is projected to lose more than half its population over 30 years.
Aging Rate of Kokonoe
The aging rate (percentage of residents aged 65 and over) is 45.2% as of 2020 and is projected to rise to 53.3% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Kokonoe is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #287 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #355 out of 1903 nationwide.
- Population size: Ranked #1449 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