Japan Population Decline Simulator

Tokyo東京都

Arakawa 荒川区

Data last updated:

Arakawa, Tokyo, Japan has a population of 226,291 (2025 national census). IPSS projections estimate 222,413 by 2030 and 231,170 by 2050 (an increase of about 6.3% from 2020), with the share of residents aged 65+ rising from 23.2% in 2020 to 27.2%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)

2025Census

226,291

2030Projection

222,413

▲ +2.3%

2040Projection

229,145

▲ +5.4%

2050Projection

231,170

▲ +6.3%

Change vs. 2020 census

Elderly Rate (65+): 2020 23.2%→2050 27.2%

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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.

Arakawa 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
1980198,126▼ -8.9%Census
1985190,061▼ -12.6%Census
1990184,809▼ -15.0%Census
1995176,886▼ -18.7%Census
2000180,468▼ -17.0%Census
2005191,207▼ -12.1%Census
2010203,296▼ -6.5%Census
2015212,264▼ -2.4%Census
2020217,475—Census
2025226,291▲ +4.1%Census
2030222,413▲ +2.3%Projection
2035226,357▲ +4.1%Projection
2040229,145▲ +5.4%Projection
2045230,666▲ +6.1%Projection
2050231,170▲ +6.3%Projection

About Arakawa

Overview

Arakawa (荒川区) is a municipality in Tokyo, Japan, with a population of 226,291 as of 2025.

Population Projection of Arakawa

According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Arakawa's population is expected to reach 222,413 by 2030 (+2.3%), 229,145 by 2040 (+5.4%), and 231,170 by 2050 (+6.3%). Arakawa is among the rare Japanese municipalities projected to see population growth.

Aging Rate of Arakawa

The aging rate (percentage of residents aged 65 and over) is 23.2% as of 2020 and is projected to rise to 27.2% by 2050. The aging rate will remain below the most severe Japanese averages.

National Comparison

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

National and Prefectural Rank

  • Population decline rate: Ranked #1866 out of 1903 municipalities nationwide.
  • Aging rate in 2050: Ranked #1872 out of 1903 nationwide.
  • Population size: Ranked #150 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 Arakawa, Tokyo?
A.According to the 2025 national census, Arakawa has a population of 226,291.
Q.What is the population of Arakawa in 2026?
A.Arakawa's population in 2026 is estimated at approximately 225,515. This is an interpolated reference value between the 2025 census (226,291) and the IPSS projection for 2030 (222,413).
Q.What is the projected population of Arakawa in the future?
A.According to IPSS projections, Arakawa's population is expected to be 222,413 in 2030, 229,145 in 2040, and 231,170 in 2050.
Q.What is the population decline rate of Arakawa?
A.Over the 30 years from 2020 to 2050, Arakawa's population is projected to change by +6.3%. The 10-year change is +2.3% and the 20-year change is +5.4%.
Q.Why is the population of Arakawa 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. Arakawa is one of the minority of Japanese municipalities projected to grow through 2050.
Q.What is the aging rate of Arakawa?
A.Arakawa's aging rate (percentage aged 65 and over) is 23.2% as of 2020, projected to rise to 27.2% 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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