Chiba千葉県
Kisarazu 木更津市
Data last updated:
Kisarazu, Chiba, Japan has a population of 137,069 (2025 national census). IPSS projections estimate 138,409 by 2030 and 133,860 by 2050 (a decrease of about 1.7% from 2020), with the share of residents aged 65+ rising from 27.9% in 2020 to 33.8%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025Census
137,069
2030Projection
138,409
▲ +1.6%
2040Projection
136,987
▲ +0.6%
2050Projection
133,860
▼ -1.7%
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.
Kisarazu 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 | 110,711 | ▼ -18.7% | Census |
| 1985 | 120,201 | ▼ -11.7% | Census |
| 1990 | 123,433 | ▼ -9.4% | Census |
| 1995 | 123,499 | ▼ -9.3% | Census |
| 2000 | 122,768 | ▼ -9.8% | Census |
| 2005 | 122,234 | ▼ -10.2% | Census |
| 2010 | 129,312 | ▼ -5.0% | Census |
| 2015 | 134,141 | ▼ -1.5% | Census |
| 2020 | 136,166 | — | Census |
| 2025 | 137,069 | ▲ +0.7% | Census |
| 2030 | 138,409 | ▲ +1.6% | Projection |
| 2035 | 138,027 | ▲ +1.4% | Projection |
| 2040 | 136,987 | ▲ +0.6% | Projection |
| 2045 | 135,565 | ▼ -0.4% | Projection |
| 2050 | 133,860 | ▼ -1.7% | Projection |
About Kisarazu
Overview
Kisarazu (木更津市) is a municipality in Chiba, Japan, with a population of 137,069 as of 2025.
Population Projection of Kisarazu
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kisarazu's population is expected to reach 138,409 by 2030 (+1.6%), 136,987 by 2040 (+0.6%), and 133,860 by 2050 (-1.7%). A modest population change is expected.
Aging Rate of Kisarazu
The aging rate (percentage of residents aged 65 and over) is 27.9% as of 2020 and is projected to rise to 33.8% by 2050. The aging rate will remain below the most severe Japanese averages.
National Comparison
Kisarazu's demographic trajectory is similar to the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1776 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1680 out of 1903 nationwide.
- Population size: Ranked #298 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