Japan Population Decline Simulator

Ibaraki茨城県

Goka 五霞町

Data last updated:

Goka, Ibaraki, Japan has a population of 7,507 (2025 national census). IPSS projections estimate 6,996 by 2030 and 4,534 by 2050 (a decrease of about 44.0% from 2020), with the share of residents aged 65+ rising from 34.1% in 2020 to 54.6%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)

2025Census

7,507

2030Projection

6,996

▼ -13.6%

2040Projection

5,765

▼ -28.8%

2050Projection

4,534

▼ -44.0%

Change vs. 2020 census

Elderly Rate (65+): 2020 34.1%→2050 54.6%

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Other municipalities in Ibaraki (茨城県)

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.

Goka Population Table (1980–2050)

Population by year: national census results (restated to current municipal boundaries) and IPSS (2023) projections based on the 2020 census.

YearPopulationvs 2020Type
19808,645▲ +6.8%Census
19858,593▲ +6.2%Census
19909,468▲ +17.0%Census
199510,312▲ +27.4%Census
200010,218▲ +26.3%Census
20059,873▲ +22.0%Census
20109,410▲ +16.3%Census
20158,786▲ +8.6%Census
20208,093—Census
20257,507▼ -7.2%Census
20306,996▼ -13.6%Projection
20356,389▼ -21.1%Projection
20405,765▼ -28.8%Projection
20455,139▼ -36.5%Projection
20504,534▼ -44.0%Projection

About Goka

Overview

Goka (五霞町) is a municipality in Ibaraki, Japan, with a population of 7,507 as of 2025.

Population Projection of Goka

According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Goka's population is expected to reach 6,996 by 2030 (-13.6%), 5,765 by 2040 (-28.8%), and 4,534 by 2050 (-44.0%). A significant population decline is projected over the next three decades.

Aging Rate of Goka

The aging rate (percentage of residents aged 65 and over) is 34.1% as of 2020 and is projected to rise to 54.6% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.

National Comparison

Goka is experiencing one of the faster rates of population decline in Japan.

National and Prefectural Rank

  • Population decline rate: Ranked #563 out of 1903 municipalities nationwide.
  • Aging rate in 2050: Ranked #296 out of 1903 nationwide.
  • Population size: Ranked #1448 out of 1917 nationwide.
  • Related: National rankings / All municipalities in Ibaraki

Earnings in Ibaraki (茨城県): Average salary in Ibaraki (茨城県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure

Frequently Asked Questions

Q.What is the current population of Goka, Ibaraki?
A.According to the 2025 national census, Goka has a population of 7,507.
Q.What is the population of Goka in 2026?
A.Goka's population in 2026 is estimated at approximately 7,405. This is an interpolated reference value between the 2025 census (7,507) and the IPSS projection for 2030 (6,996).
Q.What is the projected population of Goka in the future?
A.According to IPSS projections, Goka's population is expected to be 6,996 in 2030, 5,765 in 2040, and 4,534 in 2050.
Q.What is the population decline rate of Goka?
A.Over the 30 years from 2020 to 2050, Goka's population is projected to change by -44.0%. The 10-year change is -13.6% and the 20-year change is -28.8%.
Q.Why is the population of Goka declining?
A.Nationwide, Japan's population decline is driven by natural decrease (deaths exceeding births) and, in regional municipalities, by net out-migration of young people to major metropolitan areas. In Goka, the share of residents aged 65+ is projected to rise from 34.1% to 54.6% by 2050, which further accelerates natural decrease.
Q.What is the aging rate of Goka?
A.Goka's aging rate (percentage aged 65 and over) is 34.1% as of 2020, projected to rise to 54.6% by 2050.
Q.Where does this population data come from?
A.Historical data is sourced from Japan's national census via the e-Stat API (Statistics Bureau of Japan). Future projections are from the National Institute of Population and Social Security Research (IPSS) "Regional Population Projections 2023".
Q.Is the data up to date?
A.Historical data uses national census results through 2025. Future projections use the IPSS 2023 edition, which is based on the 2020 census.

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