Iwate岩手県
Kuzumaki 葛巻町
Data last updated:
Kuzumaki, Iwate, Japan has a population of 4,874 (2025 national census). IPSS projections estimate 4,385 by 2030 and 2,389 by 2050 (a decrease of about 57.6% from 2020), with the share of residents aged 65+ rising from 48.2% in 2020 to 60.3%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
4,874
2030
(Projection)
4,385
▼ -22.2%
2040
(Projection)
3,315
▼ -41.2%
2050
(Projection)
2,389
▼ -57.6%
Change vs. 2020 census
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Other municipalities in Iwate (岩手県)
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.
Kuzumaki 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 | 11,972 | ▲ +112.5% | Census |
| 1985 | 11,231 | ▲ +99.3% | Census |
| 1990 | 10,364 | ▲ +84.0% | Census |
| 1995 | 9,536 | ▲ +69.3% | Census |
| 2000 | 8,725 | ▲ +54.9% | Census |
| 2005 | 8,021 | ▲ +42.4% | Census |
| 2010 | 7,304 | ▲ +29.6% | Census |
| 2015 | 6,344 | ▲ +12.6% | Census |
| 2020 | 5,634 | — | Census |
| 2025 | 4,874 | ▼ -13.5% | Census |
| 2030 | 4,385 | ▼ -22.2% | Projection |
| 2035 | 3,832 | ▼ -32.0% | Projection |
| 2040 | 3,315 | ▼ -41.2% | Projection |
| 2045 | 2,832 | ▼ -49.7% | Projection |
| 2050 | 2,389 | ▼ -57.6% | Projection |
About Kuzumaki
Overview
Kuzumaki (葛巻町) is a municipality in Iwate, Japan, with a population of 4,874 as of 2025.
Population Projection of Kuzumaki
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kuzumaki's population is expected to reach 4,385 by 2030 (-22.2%), 3,315 by 2040 (-41.2%), and 2,389 by 2050 (-57.6%). The town is projected to lose more than half its population over 30 years.
Aging Rate of Kuzumaki
The aging rate (percentage of residents aged 65 and over) is 48.2% as of 2020 and is projected to rise to 60.3% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Kuzumaki is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #111 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #96 out of 1903 nationwide.
- Population size: Ranked #1600 out of 1917 nationwide.
- Related: National rankings / All municipalities in Iwate
Earnings in Iwate (岩手県): Average salary in Iwate (岩手県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure