Kochi高知県
Kounan 香南市
Data last updated:
Kounan, Kochi, Japan has a population of 31,269 (2025 national census). IPSS projections estimate 30,026 by 2030 and 24,703 by 2050 (a decrease of about 23.3% from 2020), with the share of residents aged 65+ rising from 32.6% in 2020 to 41.1%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
31,269
2030
(Projection)
30,026
▼ -6.8%
2040
(Projection)
27,483
▼ -14.7%
2050
(Projection)
24,703
▼ -23.3%
Change vs. 2020 census
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Other municipalities in Kochi (高知県)
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.
Kounan 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 | 28,493 | ▼ -11.5% | Census |
| 1985 | 30,272 | ▼ -6.0% | Census |
| 1990 | 30,664 | ▼ -4.8% | Census |
| 1995 | 31,481 | ▼ -2.3% | Census |
| 2000 | 32,659 | ▲ +1.4% | Census |
| 2005 | 33,541 | ▲ +4.1% | Census |
| 2010 | 33,830 | ▲ +5.0% | Census |
| 2015 | 32,961 | ▲ +2.3% | Census |
| 2020 | 32,207 | — | Census |
| 2025 | 31,269 | ▼ -2.9% | Census |
| 2030 | 30,026 | ▼ -6.8% | Projection |
| 2035 | 28,796 | ▼ -10.6% | Projection |
| 2040 | 27,483 | ▼ -14.7% | Projection |
| 2045 | 26,102 | ▼ -19.0% | Projection |
| 2050 | 24,703 | ▼ -23.3% | Projection |
About Kounan
Overview
Kounan (香南市) is a municipality in Kochi, Japan, with a population of 31,269 as of 2025.
Population Projection of Kounan
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kounan's population is expected to reach 30,026 by 2030 (-6.8%), 27,483 by 2040 (-14.7%), and 24,703 by 2050 (-23.3%). A significant population decline is projected over the next three decades.
Aging Rate of Kounan
The aging rate (percentage of residents aged 65 and over) is 32.6% as of 2020 and is projected to rise to 41.1% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Kounan's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1252 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1162 out of 1903 nationwide.
- Population size: Ranked #879 out of 1917 nationwide.
- Related: National rankings / All municipalities in Kochi
Earnings in Kochi (高知県): Average salary in Kochi (高知県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure