Oita大分県
Kitsuki 杵築市
Data last updated:
Kitsuki, Oita, Japan has a population of 25,219 (2025 national census). IPSS projections estimate 23,291 by 2030 and 16,456 by 2050 (a decrease of about 41.2% from 2020), with the share of residents aged 65+ rising from 38.2% in 2020 to 50.3%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
25,219
2030
(Projection)
23,291
▼ -16.8%
2040
(Projection)
19,761
▼ -29.4%
2050
(Projection)
16,456
▼ -41.2%
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.
Kitsuki 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 | 35,066 | ▲ +25.2% | Census |
| 1985 | 34,816 | ▲ +24.3% | Census |
| 1990 | 34,095 | ▲ +21.8% | Census |
| 1995 | 33,370 | ▲ +19.2% | Census |
| 2000 | 33,363 | ▲ +19.2% | Census |
| 2005 | 33,567 | ▲ +19.9% | Census |
| 2010 | 32,083 | ▲ +14.6% | Census |
| 2015 | 30,185 | ▲ +7.8% | Census |
| 2020 | 27,999 | — | Census |
| 2025 | 25,219 | ▼ -9.9% | Census |
| 2030 | 23,291 | ▼ -16.8% | Projection |
| 2035 | 21,496 | ▼ -23.2% | Projection |
| 2040 | 19,761 | ▼ -29.4% | Projection |
| 2045 | 18,074 | ▼ -35.4% | Projection |
| 2050 | 16,456 | ▼ -41.2% | Projection |
About Kitsuki
Overview
Kitsuki (杵築市) is a municipality in Oita, Japan, with a population of 25,219 as of 2025.
Population Projection of Kitsuki
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kitsuki's population is expected to reach 23,291 by 2030 (-16.8%), 19,761 by 2040 (-29.4%), and 16,456 by 2050 (-41.2%). A significant population decline is projected over the next three decades.
Aging Rate of Kitsuki
The aging rate (percentage of residents aged 65 and over) is 38.2% as of 2020 and is projected to rise to 50.3% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Kitsuki is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #675 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #545 out of 1903 nationwide.
- Population size: Ranked #989 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