Chiba千葉県
Tateyama 館山市
Data last updated:
Tateyama, Chiba, Japan has a population of 41,119 (2025 national census). IPSS projections estimate 40,024 by 2030 and 30,710 by 2050 (a decrease of about 32.0% from 2020), with the share of residents aged 65+ rising from 40.9% in 2020 to 49.9%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
41,119
2030
(Projection)
40,024
▼ -11.4%
2040
(Projection)
35,327
▼ -21.8%
2050
(Projection)
30,710
▼ -32.0%
Change vs. 2020 census
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Other municipalities in Chiba (千葉県)
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.
Tateyama 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 | 56,257 | ▲ +24.6% | Census |
| 1985 | 56,035 | ▲ +24.1% | Census |
| 1990 | 54,575 | ▲ +20.9% | Census |
| 1995 | 52,880 | ▲ +17.1% | Census |
| 2000 | 51,412 | ▲ +13.9% | Census |
| 2005 | 50,527 | ▲ +11.9% | Census |
| 2010 | 49,290 | ▲ +9.2% | Census |
| 2015 | 47,464 | ▲ +5.1% | Census |
| 2020 | 45,153 | — | Census |
| 2025 | 41,119 | ▼ -8.9% | Census |
| 2030 | 40,024 | ▼ -11.4% | Projection |
| 2035 | 37,685 | ▼ -16.5% | Projection |
| 2040 | 35,327 | ▼ -21.8% | Projection |
| 2045 | 32,962 | ▼ -27.0% | Projection |
| 2050 | 30,710 | ▼ -32.0% | Projection |
About Tateyama
Overview
Tateyama (館山市) is a municipality in Chiba, Japan, with a population of 41,119 as of 2025.
Population Projection of Tateyama
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Tateyama's population is expected to reach 40,024 by 2030 (-11.4%), 35,327 by 2040 (-21.8%), and 30,710 by 2050 (-32.0%). A significant population decline is projected over the next three decades.
Aging Rate of Tateyama
The aging rate (percentage of residents aged 65 and over) is 40.9% as of 2020 and is projected to rise to 49.9% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Tateyama's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #989 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #569 out of 1903 nationwide.
- Population size: Ranked #769 out of 1917 nationwide.
- Related: National rankings / All municipalities in Chiba
Earnings in Chiba (千葉県): Average salary in Chiba (千葉県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure