Japan Population Decline Simulator

Saitama埼玉県

Shiki 志木市

Data last updated:

Shiki, Saitama, Japan has a population of 75,036 (2025 national census). IPSS projections estimate 77,221 by 2030 and 76,611 by 2050 (an increase of about 1.7% from 2020), with the share of residents aged 65+ rising from 24.9% in 2020 to 32.1%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)

2025

(Census)

75,036

2030

(Projection)

77,221

▲ +2.5%

2040

(Projection)

77,357

▲ +2.7%

2050

(Projection)

76,611

▲ +1.7%

Change vs. 2020 census

Elderly Rate (65+): 2020 24.9%→2050 32.1%

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Other municipalities in Saitama (埼玉県)

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.

Shiki 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
198050,925▼ -32.4%Census
198558,935▼ -21.8%Census
199063,491▼ -15.7%Census
199564,430▼ -14.5%Census
200065,076▼ -13.6%Census
200567,448▼ -10.5%Census
201069,611▼ -7.6%Census
201572,676▼ -3.5%Census
202075,346—Census
202575,036▼ -0.4%Census
203077,221▲ +2.5%Projection
203577,444▲ +2.8%Projection
204077,357▲ +2.7%Projection
204577,047▲ +2.3%Projection
205076,611▲ +1.7%Projection

About Shiki

Overview

Shiki (志木市) is a municipality in Saitama, Japan, with a population of 75,036 as of 2025.

Population Projection of Shiki

According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Shiki's population is expected to reach 77,221 by 2030 (+2.5%), 77,357 by 2040 (+2.7%), and 76,611 by 2050 (+1.7%). Shiki is among the rare Japanese municipalities projected to see population growth.

Aging Rate of Shiki

The aging rate (percentage of residents aged 65 and over) is 24.9% as of 2020 and is projected to rise to 32.1% by 2050. The aging rate will remain below the most severe Japanese averages.

National Comparison

Shiki's demographic trajectory is similar to the national average.

National and Prefectural Rank

  • Population decline rate: Ranked #1817 out of 1903 municipalities nationwide.
  • Aging rate in 2050: Ranked #1766 out of 1903 nationwide.
  • Population size: Ranked #517 out of 1917 nationwide.
  • Related: National rankings / All municipalities in Saitama

Earnings in Saitama (埼玉県): Average salary in Saitama (埼玉県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure

Frequently Asked Questions

Q.What is the current population of Shiki, Saitama?
A.According to the 2025 national census, Shiki has a population of 75,036.
Q.What is the population of Shiki in 2026?
A.Shiki's population in 2026 is estimated at approximately 75,473. This is an interpolated reference value between the 2025 census (75,036) and the IPSS projection for 2030 (77,221).
Q.What is the projected population of Shiki in the future?
A.According to IPSS projections, Shiki's population is expected to be 77,221 in 2030, 77,357 in 2040, and 76,611 in 2050.
Q.What is the population decline rate of Shiki?
A.Over the 30 years from 2020 to 2050, Shiki's population is projected to change by +1.7%. The 10-year change is +2.5% and the 20-year change is +2.7%.
Q.Why is the population of Shiki growing?
A.Municipalities with growing populations typically benefit from net in-migration driven by good access to major metropolitan areas, housing development, and family support policies. Shiki is one of the minority of Japanese municipalities projected to grow through 2050.
Q.What is the aging rate of Shiki?
A.Shiki's aging rate (percentage aged 65 and over) is 24.9% as of 2020, projected to rise to 32.1% 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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