Saga佐賀県
Kiyama 基山町
Data last updated:
Kiyama, Saga, Japan has a population of 17,263 (2025 national census). IPSS projections estimate 16,199 by 2030 and 13,129 by 2050 (a decrease of about 23.9% from 2020), with the share of residents aged 65+ rising from 31.0% in 2020 to 38.9%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025Census
17,263
2030Projection
16,199
▼ -6.1%
2040Projection
14,650
▼ -15.1%
2050Projection
13,129
▼ -23.9%
Change vs. 2020 census
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Other municipalities in Saga (佐賀県)
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.
Kiyama 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 | 11,501 | ▼ -33.3% | Census |
| 1985 | 13,495 | ▼ -21.8% | Census |
| 1990 | 14,455 | ▼ -16.2% | Census |
| 1995 | 18,444 | ▲ +6.9% | Census |
| 2000 | 19,176 | ▲ +11.2% | Census |
| 2005 | 18,889 | ▲ +9.5% | Census |
| 2010 | 17,837 | ▲ +3.4% | Census |
| 2015 | 17,501 | ▲ +1.5% | Census |
| 2020 | 17,250 | — | Census |
| 2025 | 17,263 | ▲ +0.1% | Census |
| 2030 | 16,199 | ▼ -6.1% | Projection |
| 2035 | 15,453 | ▼ -10.4% | Projection |
| 2040 | 14,650 | ▼ -15.1% | Projection |
| 2045 | 13,848 | ▼ -19.7% | Projection |
| 2050 | 13,129 | ▼ -23.9% | Projection |
About Kiyama
Overview
Kiyama (基山町) is a municipality in Saga, Japan, with a population of 17,263 as of 2025.
Population Projection of Kiyama
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kiyama's population is expected to reach 16,199 by 2030 (-6.1%), 14,650 by 2040 (-15.1%), and 13,129 by 2050 (-23.9%). A significant population decline is projected over the next three decades.
Aging Rate of Kiyama
The aging rate (percentage of residents aged 65 and over) is 31.0% as of 2020 and is projected to rise to 38.9% by 2050. The aging rate will remain below the most severe Japanese averages.
National Comparison
Kiyama's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1241 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1355 out of 1903 nationwide.
- Population size: Ranked #1131 out of 1917 nationwide.
- Related: National rankings / All municipalities in Saga
Earnings in Saga (佐賀県): Average salary in Saga (佐賀県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure