Okayama岡山県
Bizen 備前市
Data last updated:
Bizen, Okayama, Japan has a population of 28,640 (2025 national census). IPSS projections estimate 26,316 by 2030 and 16,553 by 2050 (a decrease of about 48.8% from 2020), with the share of residents aged 65+ rising from 39.5% in 2020 to 53.4%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025Census
28,640
2030Projection
26,316
▼ -18.6%
2040Projection
21,085
▼ -34.8%
2050Projection
16,553
▼ -48.8%
Change vs. 2020 census
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Other municipalities in Okayama (岡山県)
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.
Bizen 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 | 49,306 | ▲ +52.6% | Census |
| 1985 | 48,112 | ▲ +48.9% | Census |
| 1990 | 46,319 | ▲ +43.3% | Census |
| 1995 | 44,855 | ▲ +38.8% | Census |
| 2000 | 42,534 | ▲ +31.6% | Census |
| 2005 | 40,241 | ▲ +24.5% | Census |
| 2010 | 37,839 | ▲ +17.1% | Census |
| 2015 | 35,179 | ▲ +8.8% | Census |
| 2020 | 32,320 | — | Census |
| 2025 | 28,640 | ▼ -11.4% | Census |
| 2030 | 26,316 | ▼ -18.6% | Projection |
| 2035 | 23,642 | ▼ -26.9% | Projection |
| 2040 | 21,085 | ▼ -34.8% | Projection |
| 2045 | 18,706 | ▼ -42.1% | Projection |
| 2050 | 16,553 | ▼ -48.8% | Projection |
About Bizen
Overview
Bizen (備前市) is a municipality in Okayama, Japan, with a population of 28,640 as of 2025.
Population Projection of Bizen
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Bizen's population is expected to reach 26,316 by 2030 (-18.6%), 21,085 by 2040 (-34.8%), and 16,553 by 2050 (-48.8%). A significant population decline is projected over the next three decades.
Aging Rate of Bizen
The aging rate (percentage of residents aged 65 and over) is 39.5% as of 2020 and is projected to rise to 53.4% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Bizen is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #382 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #348 out of 1903 nationwide.
- Population size: Ranked #933 out of 1917 nationwide.
- Related: National rankings / All municipalities in Okayama
Earnings in Okayama (岡山県): Average salary in Okayama (岡山県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure