Chiba千葉県
Inzai 印西市
Data last updated:
Inzai, Chiba, Japan has a population of 110,339 (2025 national census). IPSS projections estimate 113,660 by 2030 and 119,819 by 2050 (an increase of about 16.8% from 2020), with the share of residents aged 65+ rising from 23.2% in 2020 to 31.8%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025年实际
110,339人
2030年预测
113,660人
▲ +10.8%
2040年预测
118,444人
▲ +15.4%
2050年预测
119,819人
▲ +16.8%
Change vs. 2020 census
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Chiba (千葉県)的其他市区町村
数据来源
- 日本政府统计综合窗口(e-Stat)（https://www.e-stat.go.jp/）
- 国立社会保障・人口问题研究所「日本地区别未来推计人口（令和5年推计）」
※本服务使用e-Stat的API功能，但服务内容不受日本政府保证。
Inzai 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 | 29,970 | ▼ -70.8% | Census |
| 1985 | 35,745 | ▼ -65.2% | Census |
| 1990 | 55,131 | ▼ -46.3% | Census |
| 1995 | 72,278 | ▼ -29.6% | Census |
| 2000 | 79,780 | ▼ -22.2% | Census |
| 2005 | 81,102 | ▼ -21.0% | Census |
| 2010 | 88,176 | ▼ -14.1% | Census |
| 2015 | 92,670 | ▼ -9.7% | Census |
| 2020 | 102,609 | — | Census |
| 2025 | 110,339 | ▲ +7.5% | Census |
| 2030 | 113,660 | ▲ +10.8% | Projection |
| 2035 | 116,621 | ▲ +13.7% | Projection |
| 2040 | 118,444 | ▲ +15.4% | Projection |
| 2045 | 119,404 | ▲ +16.4% | Projection |
| 2050 | 119,819 | ▲ +16.8% | Projection |
About Inzai
Overview
Inzai (印西市) is a municipality in Chiba, Japan, with a population of 110,339 as of 2025.
Population Projection of Inzai
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Inzai's population is expected to reach 113,660 by 2030 (+10.8%), 118,444 by 2040 (+15.4%), and 119,819 by 2050 (+16.8%). Inzai is among the rare Japanese municipalities projected to see population growth.
Aging Rate of Inzai
The aging rate (percentage of residents aged 65 and over) is 23.2% as of 2020 and is projected to rise to 31.8% by 2050. The aging rate will remain below the most severe Japanese averages.
National Comparison
Inzai stands out as one of the few Japanese municipalities with continued population growth.
National and Prefectural Rank
- Population decline rate: Ranked #1898 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1776 out of 1903 nationwide.
- Population size: Ranked #374 out of 1917 nationwide.
- Related: National rankings / All municipalities in Chiba
Chiba (千葉県)的收入水平: Chiba (千葉県)的平均年收入（按年龄、性别、企业规模）jpsalary / 厚生劳动省 工资结构基本统计调查