Shiga滋賀県
Kouka 甲賀市
Data last updated:
Kouka, Shiga, Japan has a population of 84,920 (2025 national census). IPSS projections estimate 81,807 by 2030 and 65,677 by 2050 (a decrease of about 25.7% from 2020), with the share of residents aged 65+ rising from 28.4% in 2020 to 39.7%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025Census
84,920
2030Projection
81,807
▼ -7.4%
2040Projection
74,111
▼ -16.1%
2050Projection
65,677
▼ -25.7%
Change vs. 2020 census
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Other municipalities in Shiga (滋賀県)
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.
Kouka 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 | 75,203 | ▼ -14.9% | Census |
| 1985 | 79,088 | ▼ -10.5% | Census |
| 1990 | 82,668 | ▼ -6.4% | Census |
| 1995 | 90,744 | ▲ +2.7% | Census |
| 2000 | 92,484 | ▲ +4.7% | Census |
| 2005 | 93,853 | ▲ +6.2% | Census |
| 2010 | 92,704 | ▲ +4.9% | Census |
| 2015 | 90,901 | ▲ +2.9% | Census |
| 2020 | 88,358 | — | Census |
| 2025 | 84,920 | ▼ -3.9% | Census |
| 2030 | 81,807 | ▼ -7.4% | Projection |
| 2035 | 78,090 | ▼ -11.6% | Projection |
| 2040 | 74,111 | ▼ -16.1% | Projection |
| 2045 | 69,930 | ▼ -20.9% | Projection |
| 2050 | 65,677 | ▼ -25.7% | Projection |
About Kouka
Overview
Kouka (甲賀市) is a municipality in Shiga, Japan, with a population of 84,920 as of 2025.
Population Projection of Kouka
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kouka's population is expected to reach 81,807 by 2030 (-7.4%), 74,111 by 2040 (-16.1%), and 65,677 by 2050 (-25.7%). A significant population decline is projected over the next three decades.
Aging Rate of Kouka
The aging rate (percentage of residents aged 65 and over) is 28.4% as of 2020 and is projected to rise to 39.7% by 2050. The aging rate will remain below the most severe Japanese averages.
National Comparison
Kouka's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1188 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1290 out of 1903 nationwide.
- Population size: Ranked #470 out of 1917 nationwide.
- Related: National rankings / All municipalities in Shiga
Earnings in Shiga (滋賀県): Average salary in Shiga (滋賀県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure