Japan Population Decline Simulator

Saitama埼玉県

Midori さいたま市緑区

Data last updated:

Midori, Saitama, Japan has a population of 132,357 (2025 national census). IPSS projections estimate 140,195 by 2030 and 145,265 by 2050 (an increase of about 13.2% from 2020), with the share of residents aged 65+ rising from 22.6% in 2020 to 32.2%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)

2025

(Census)

132,357

2030

(Projection)

140,195

▲ +9.3%

2040

(Projection)

144,320

▲ +12.5%

2050

(Projection)

145,265

▲ +13.2%

Change vs. 2020 census

Elderly Rate (65+): 2020 22.6%→2050 32.2%

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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.

Midori Population Table (2005–2050)

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

YearPopulationvs 2020Type
2005104,018▼ -18.9%Census
2010110,118▼ -14.2%Census
2015116,522▼ -9.2%Census
2020128,321—Census
2025132,357▲ +3.1%Census
2030140,195▲ +9.3%Projection
2035142,763▲ +11.3%Projection
2040144,320▲ +12.5%Projection
2045145,055▲ +13.0%Projection
2050145,265▲ +13.2%Projection

About Midori

Overview

Midori (さいたま市緑区) is a municipality in Saitama, Japan, with a population of 132,357 as of 2025.

Population Projection of Midori

According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Midori's population is expected to reach 140,195 by 2030 (+9.3%), 144,320 by 2040 (+12.5%), and 145,265 by 2050 (+13.2%). Midori is among the rare Japanese municipalities projected to see population growth.

Aging Rate of Midori

The aging rate (percentage of residents aged 65 and over) is 22.6% as of 2020 and is projected to rise to 32.2% by 2050. The aging rate will remain below the most severe Japanese averages.

National Comparison

Midori stands out as one of the few Japanese municipalities with continued population growth.

National and Prefectural Rank

  • Population decline rate: Ranked #1896 out of 1903 municipalities nationwide.
  • Aging rate in 2050: Ranked #1760 out of 1903 nationwide.
  • Population size: Ranked #310 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 Midori, Saitama?
A.According to the 2025 national census, Midori has a population of 132,357.
Q.What is the population of Midori in 2026?
A.Midori's population in 2026 is estimated at approximately 133,925. This is an interpolated reference value between the 2025 census (132,357) and the IPSS projection for 2030 (140,195).
Q.What is the projected population of Midori in the future?
A.According to IPSS projections, Midori's population is expected to be 140,195 in 2030, 144,320 in 2040, and 145,265 in 2050.
Q.What is the population decline rate of Midori?
A.Over the 30 years from 2020 to 2050, Midori's population is projected to change by +13.2%. The 10-year change is +9.3% and the 20-year change is +12.5%.
Q.Why is the population of Midori 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. Midori is one of the minority of Japanese municipalities projected to grow through 2050.
Q.What is the aging rate of Midori?
A.Midori's aging rate (percentage aged 65 and over) is 22.6% as of 2020, projected to rise to 32.2% 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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