Nagano長野県
Koumi 小海町
Data last updated:
2020
(Census)
4,357
2030
(Projection)
3,642
▼ -16.4%
2040
(Projection)
2,984
▼ -31.5%
2050
(Projection)
2,408
▼ -44.7%
Other municipalities in Nagano (長野県)
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.
About Koumi
Overview
Koumi (小海町) is a municipality in Nagano, Japan, with a population of 4,357 as of 2020.
Population Projection
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Koumi's population is expected to reach 3,642 by 2030 (-16.4%), 2,984 by 2040 (-31.5%), and 2,408 by 2050 (-44.7%). A significant population decline is projected over the next three decades.
Aging Outlook
The aging rate (percentage of residents aged 65 and over) is 42.2% as of 2020 and is projected to rise to 52.4% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Koumi is experiencing one of the faster rates of population decline in Japan.