Oita大分県
Tsukumi 津久見市
Data last updated:
Tsukumi, Oita, Japan has a population of 14,047 (2025 national census). IPSS projections estimate 12,381 by 2030 and 6,800 by 2050 (a decrease of about 57.8% from 2020), with the share of residents aged 65+ rising from 45.0% in 2020 to 57.0%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
14,047
2030
(Projection)
12,381
▼ -23.1%
2040
(Projection)
9,342
▼ -42.0%
2050
(Projection)
6,800
▼ -57.8%
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.
Tsukumi 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 | 30,454 | ▲ +89.2% | Census |
| 1985 | 28,836 | ▲ +79.1% | Census |
| 1990 | 26,797 | ▲ +66.4% | Census |
| 1995 | 24,848 | ▲ +54.3% | Census |
| 2000 | 23,164 | ▲ +43.9% | Census |
| 2005 | 21,456 | ▲ +33.3% | Census |
| 2010 | 19,917 | ▲ +23.7% | Census |
| 2015 | 17,969 | ▲ +11.6% | Census |
| 2020 | 16,100 | — | Census |
| 2025 | 14,047 | ▼ -12.8% | Census |
| 2030 | 12,381 | ▼ -23.1% | Projection |
| 2035 | 10,792 | ▼ -33.0% | Projection |
| 2040 | 9,342 | ▼ -42.0% | Projection |
| 2045 | 7,987 | ▼ -50.4% | Projection |
| 2050 | 6,800 | ▼ -57.8% | Projection |
About Tsukumi
Overview
Tsukumi (津久見市) is a municipality in Oita, Japan, with a population of 14,047 as of 2025.
Population Projection of Tsukumi
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Tsukumi's population is expected to reach 12,381 by 2030 (-23.1%), 9,342 by 2040 (-42.0%), and 6,800 by 2050 (-57.8%). The town is projected to lose more than half its population over 30 years.
Aging Rate of Tsukumi
The aging rate (percentage of residents aged 65 and over) is 45.0% as of 2020 and is projected to rise to 57.0% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Tsukumi is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #105 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #202 out of 1903 nationwide.
- Population size: Ranked #1212 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