Japan Population Decline Simulator

Hyogo兵庫県

Kawanishi 川西市

Data last updated:

Kawanishi, Hyogo, Japan has a population of 149,531 (2025 national census). IPSS projections estimate 141,496 by 2030 and 119,770 by 2050 (a decrease of about 21.4% from 2020), with the share of residents aged 65+ rising from 32.4% in 2020 to 41.2%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)

2025

(Census)

149,531

2030

(Projection)

141,496

▼ -7.1%

2040

(Projection)

129,950

▼ -14.7%

2050

(Projection)

119,770

▼ -21.4%

Change vs. 2020 census

Elderly Rate (65+): 2020 32.4%→2050 41.2%

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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.

Kawanishi 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
1980129,834▼ -14.8%Census
1985136,376▼ -10.5%Census
1990141,253▼ -7.3%Census
1995144,539▼ -5.1%Census
2000153,762▲ +0.9%Census
2005157,668▲ +3.5%Census
2010156,423▲ +2.7%Census
2015156,375▲ +2.7%Census
2020152,321—Census
2025149,531▼ -1.8%Census
2030141,496▼ -7.1%Projection
2035135,546▼ -11.0%Projection
2040129,950▼ -14.7%Projection
2045124,755▼ -18.1%Projection
2050119,770▼ -21.4%Projection

About Kawanishi

Overview

Kawanishi (川西市) is a municipality in Hyogo, Japan, with a population of 149,531 as of 2025.

Population Projection of Kawanishi

According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Kawanishi's population is expected to reach 141,496 by 2030 (-7.1%), 129,950 by 2040 (-14.7%), and 119,770 by 2050 (-21.4%). A significant population decline is projected over the next three decades.

Aging Rate of Kawanishi

The aging rate (percentage of residents aged 65 and over) is 32.4% as of 2020 and is projected to rise to 41.2% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.

National Comparison

Kawanishi's population decline rate exceeds the national average.

National and Prefectural Rank

  • Population decline rate: Ranked #1318 out of 1903 municipalities nationwide.
  • Aging rate in 2050: Ranked #1152 out of 1903 nationwide.
  • Population size: Ranked #265 out of 1917 nationwide.
  • Related: National rankings / All municipalities in Hyogo

Earnings in Hyogo (兵庫県): Average salary in Hyogo (兵庫県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure

Frequently Asked Questions

Q.What is the current population of Kawanishi, Hyogo?
A.According to the 2025 national census, Kawanishi has a population of 149,531.
Q.What is the population of Kawanishi in 2026?
A.Kawanishi's population in 2026 is estimated at approximately 147,924. This is an interpolated reference value between the 2025 census (149,531) and the IPSS projection for 2030 (141,496).
Q.What is the projected population of Kawanishi in the future?
A.According to IPSS projections, Kawanishi's population is expected to be 141,496 in 2030, 129,950 in 2040, and 119,770 in 2050.
Q.What is the population decline rate of Kawanishi?
A.Over the 30 years from 2020 to 2050, Kawanishi's population is projected to change by -21.4%. The 10-year change is -7.1% and the 20-year change is -14.7%.
Q.Why is the population of Kawanishi 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 Kawanishi, the share of residents aged 65+ is projected to rise from 32.4% to 41.2% by 2050, which further accelerates natural decrease.
Q.What is the aging rate of Kawanishi?
A.Kawanishi's aging rate (percentage aged 65 and over) is 32.4% as of 2020, projected to rise to 41.2% 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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