Kumamoto熊本県
Yamaga 山鹿市
Data last updated:
Yamaga, Kumamoto, Japan has a population of 45,496 (2025 national census). IPSS projections estimate 42,061 by 2030 and 30,205 by 2050 (a decrease of about 38.4% from 2020), with the share of residents aged 65+ rising from 38.0% in 2020 to 46.6%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
45,496
2030
(Projection)
42,061
▼ -14.2%
2040
(Projection)
35,908
▼ -26.8%
2050
(Projection)
30,205
▼ -38.4%
Change vs. 2020 census
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Other municipalities in Kumamoto (熊本県)
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.
Yamaga 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 | 62,839 | ▲ +28.2% | Census |
| 1985 | 63,234 | ▲ +29.0% | Census |
| 1990 | 62,150 | ▲ +26.8% | Census |
| 1995 | 60,991 | ▲ +24.4% | Census |
| 2000 | 59,491 | ▲ +21.3% | Census |
| 2005 | 57,726 | ▲ +17.7% | Census |
| 2010 | 55,391 | ▲ +13.0% | Census |
| 2015 | 52,264 | ▲ +6.6% | Census |
| 2020 | 49,025 | — | Census |
| 2025 | 45,496 | ▼ -7.2% | Census |
| 2030 | 42,061 | ▼ -14.2% | Projection |
| 2035 | 38,952 | ▼ -20.5% | Projection |
| 2040 | 35,908 | ▼ -26.8% | Projection |
| 2045 | 32,984 | ▼ -32.7% | Projection |
| 2050 | 30,205 | ▼ -38.4% | Projection |
About Yamaga
Overview
Yamaga (山鹿市) is a municipality in Kumamoto, Japan, with a population of 45,496 as of 2025.
Population Projection of Yamaga
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Yamaga's population is expected to reach 42,061 by 2030 (-14.2%), 35,908 by 2040 (-26.8%), and 30,205 by 2050 (-38.4%). A significant population decline is projected over the next three decades.
Aging Rate of Yamaga
The aging rate (percentage of residents aged 65 and over) is 38.0% as of 2020 and is projected to rise to 46.6% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Yamaga's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #779 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #785 out of 1903 nationwide.
- Population size: Ranked #717 out of 1917 nationwide.
- Related: National rankings / All municipalities in Kumamoto
Earnings in Kumamoto (熊本県): Average salary in Kumamoto (熊本県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure