Kochi高知県
Nankoku 南国市
Data last updated:
Nankoku, Kochi, Japan has a population of 45,359 (2025 national census). IPSS projections estimate 42,718 by 2030 and 33,108 by 2050 (a decrease of about 29.1% from 2020), with the share of residents aged 65+ rising from 32.1% in 2020 to 42.6%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
45,359
2030
(Projection)
42,718
▼ -8.5%
2040
(Projection)
38,120
▼ -18.3%
2050
(Projection)
33,108
▼ -29.1%
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.
Nankoku 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 | 44,866 | ▼ -3.9% | Census |
| 1985 | 47,554 | ▲ +1.9% | Census |
| 1990 | 46,823 | ▲ +0.3% | Census |
| 1995 | 48,192 | ▲ +3.3% | Census |
| 2000 | 49,965 | ▲ +7.1% | Census |
| 2005 | 50,758 | ▲ +8.8% | Census |
| 2010 | 49,472 | ▲ +6.0% | Census |
| 2015 | 47,982 | ▲ +2.8% | Census |
| 2020 | 46,664 | — | Census |
| 2025 | 45,359 | ▼ -2.8% | Census |
| 2030 | 42,718 | ▼ -8.5% | Projection |
| 2035 | 40,516 | ▼ -13.2% | Projection |
| 2040 | 38,120 | ▼ -18.3% | Projection |
| 2045 | 35,583 | ▼ -23.7% | Projection |
| 2050 | 33,108 | ▼ -29.1% | Projection |
About Nankoku
Overview
Nankoku (南国市) is a municipality in Kochi, Japan, with a population of 45,359 as of 2025.
Population Projection of Nankoku
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Nankoku's population is expected to reach 42,718 by 2030 (-8.5%), 38,120 by 2040 (-18.3%), and 33,108 by 2050 (-29.1%). A significant population decline is projected over the next three decades.
Aging Rate of Nankoku
The aging rate (percentage of residents aged 65 and over) is 32.1% as of 2020 and is projected to rise to 42.6% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Nankoku's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1089 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1050 out of 1903 nationwide.
- Population size: Ranked #722 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