Niigata新潟県
Tainai 胎内市
Data last updated:
Tainai, Niigata, Japan has a population of 26,235 (2025 national census). IPSS projections estimate 24,473 by 2030 and 17,257 by 2050 (a decrease of about 39.5% from 2020), with the share of residents aged 65+ rising from 36.0% in 2020 to 46.6%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
26,235
2030
(Projection)
24,473
▼ -14.2%
2040
(Projection)
20,825
▼ -27.0%
2050
(Projection)
17,257
▼ -39.5%
Change vs. 2020 census
Enter your age
See the population of 胎内市 when you turn 50, 60, 70 and 80.
Other municipalities in Niigata (新潟県)
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.
Tainai 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 | 35,605 | ▲ +24.9% | Census |
| 1985 | 35,567 | ▲ +24.8% | Census |
| 1990 | 35,517 | ▲ +24.6% | Census |
| 1995 | 34,830 | ▲ +22.2% | Census |
| 2000 | 34,278 | ▲ +20.2% | Census |
| 2005 | 32,813 | ▲ +15.1% | Census |
| 2010 | 31,424 | ▲ +10.2% | Census |
| 2015 | 30,198 | ▲ +5.9% | Census |
| 2020 | 28,509 | — | Census |
| 2025 | 26,235 | ▼ -8.0% | Census |
| 2030 | 24,473 | ▼ -14.2% | Projection |
| 2035 | 22,643 | ▼ -20.6% | Projection |
| 2040 | 20,825 | ▼ -27.0% | Projection |
| 2045 | 19,004 | ▼ -33.3% | Projection |
| 2050 | 17,257 | ▼ -39.5% | Projection |
About Tainai
Overview
Tainai (胎内市) is a municipality in Niigata, Japan, with a population of 26,235 as of 2025.
Population Projection of Tainai
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Tainai's population is expected to reach 24,473 by 2030 (-14.2%), 20,825 by 2040 (-27.0%), and 17,257 by 2050 (-39.5%). A significant population decline is projected over the next three decades.
Aging Rate of Tainai
The aging rate (percentage of residents aged 65 and over) is 36.0% 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
Tainai's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #734 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #780 out of 1903 nationwide.
- Population size: Ranked #970 out of 1917 nationwide.
- Related: National rankings / All municipalities in Niigata
Earnings in Niigata (新潟県): Average salary in Niigata (新潟県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure