Japan Population Decline Simulator

Tokyo東京都

Mitaka 三鷹市

Data last updated:

Mitaka, Tokyo, Japan has a population of 194,892 (2025 national census). IPSS projections estimate 200,381 by 2030 and 202,399 by 2050 (an increase of about 3.6% from 2020), with the share of residents aged 65+ rising from 22.1% in 2020 to 28.1%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)

2025Census

194,892

2030Projection

200,381

▲ +2.6%

2040Projection

203,316

▲ +4.1%

2050Projection

202,399

▲ +3.6%

Change vs. 2020 census

Elderly Rate (65+): 2020 22.1%→2050 28.1%

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Other municipalities in Tokyo (東京都)

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.

Mitaka 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
1980164,526▼ -15.8%Census
1985166,252▼ -14.9%Census
1990165,564▼ -15.3%Census
1995165,721▼ -15.2%Census
2000171,612▼ -12.2%Census
2005177,016▼ -9.4%Census
2010186,083▼ -4.8%Census
2015186,936▼ -4.3%Census
2020195,391—Census
2025194,892▼ -0.3%Census
2030200,381▲ +2.6%Projection
2035202,377▲ +3.6%Projection
2040203,316▲ +4.1%Projection
2045203,180▲ +4.0%Projection
2050202,399▲ +3.6%Projection

About Mitaka

Overview

Mitaka (三鷹市) is a municipality in Tokyo, Japan, with a population of 194,892 as of 2025.

Population Projection of Mitaka

According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Mitaka's population is expected to reach 200,381 by 2030 (+2.6%), 203,316 by 2040 (+4.1%), and 202,399 by 2050 (+3.6%). Mitaka is among the rare Japanese municipalities projected to see population growth.

Aging Rate of Mitaka

The aging rate (percentage of residents aged 65 and over) is 22.1% as of 2020 and is projected to rise to 28.1% by 2050. The aging rate will remain below the most severe Japanese averages.

National Comparison

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

National and Prefectural Rank

  • Population decline rate: Ranked #1844 out of 1903 municipalities nationwide.
  • Aging rate in 2050: Ranked #1864 out of 1903 nationwide.
  • Population size: Ranked #185 out of 1917 nationwide.
  • Related: National rankings / All municipalities in Tokyo

Earnings in Tokyo (東京都): Average salary in Tokyo (東京都) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure

Frequently Asked Questions

Q.What is the current population of Mitaka, Tokyo?
A.According to the 2025 national census, Mitaka has a population of 194,892.
Q.What is the population of Mitaka in 2026?
A.Mitaka's population in 2026 is estimated at approximately 195,990. This is an interpolated reference value between the 2025 census (194,892) and the IPSS projection for 2030 (200,381).
Q.What is the projected population of Mitaka in the future?
A.According to IPSS projections, Mitaka's population is expected to be 200,381 in 2030, 203,316 in 2040, and 202,399 in 2050.
Q.What is the population decline rate of Mitaka?
A.Over the 30 years from 2020 to 2050, Mitaka's population is projected to change by +3.6%. The 10-year change is +2.6% and the 20-year change is +4.1%.
Q.Why is the population of Mitaka 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. Mitaka is one of the minority of Japanese municipalities projected to grow through 2050.
Q.What is the aging rate of Mitaka?
A.Mitaka's aging rate (percentage aged 65 and over) is 22.1% as of 2020, projected to rise to 28.1% 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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