Japan Population Decline Simulator

Tokyo東京都

Bunkyou 文京区

Data last updated:

Bunkyou, Tokyo, Japan has a population of 249,800 (2025 national census). IPSS projections estimate 258,335 by 2030 and 271,626 by 2050 (an increase of about 13.1% from 2020), with the share of residents aged 65+ rising from 18.7% in 2020 to 26.0%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)

2025Census

249,800

2030Projection

258,335

▲ +7.6%

2040Projection

269,344

▲ +12.2%

2050Projection

271,626

▲ +13.1%

Change vs. 2020 census

Elderly Rate (65+): 2020 18.7%→2050 26%

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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.

Bunkyou 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
1980202,351▼ -15.7%Census
1985195,876▼ -18.4%Census
1990181,269▼ -24.5%Census
1995172,474▼ -28.2%Census
2000176,017▼ -26.7%Census
2005189,632▼ -21.0%Census
2010206,626▼ -13.9%Census
2015219,724▼ -8.5%Census
2020240,069—Census
2025249,800▲ +4.1%Census
2030258,335▲ +7.6%Projection
2035264,924▲ +10.4%Projection
2040269,344▲ +12.2%Projection
2045271,302▲ +13.0%Projection
2050271,626▲ +13.1%Projection

About Bunkyou

Overview

Bunkyou (文京区) is a municipality in Tokyo, Japan, with a population of 249,800 as of 2025.

Population Projection of Bunkyou

According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Bunkyou's population is expected to reach 258,335 by 2030 (+7.6%), 269,344 by 2040 (+12.2%), and 271,626 by 2050 (+13.1%). Bunkyou is among the rare Japanese municipalities projected to see population growth.

Aging Rate of Bunkyou

The aging rate (percentage of residents aged 65 and over) is 18.7% as of 2020 and is projected to rise to 26.0% by 2050. The aging rate will remain below the most severe Japanese averages.

National Comparison

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

National and Prefectural Rank

  • Population decline rate: Ranked #1895 out of 1903 municipalities nationwide.
  • Aging rate in 2050: Ranked #1884 out of 1903 nationwide.
  • Population size: Ranked #123 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 Bunkyou, Tokyo?
A.According to the 2025 national census, Bunkyou has a population of 249,800.
Q.What is the population of Bunkyou in 2026?
A.Bunkyou's population in 2026 is estimated at approximately 251,507. This is an interpolated reference value between the 2025 census (249,800) and the IPSS projection for 2030 (258,335).
Q.What is the projected population of Bunkyou in the future?
A.According to IPSS projections, Bunkyou's population is expected to be 258,335 in 2030, 269,344 in 2040, and 271,626 in 2050.
Q.What is the population decline rate of Bunkyou?
A.Over the 30 years from 2020 to 2050, Bunkyou's population is projected to change by +13.1%. The 10-year change is +7.6% and the 20-year change is +12.2%.
Q.Why is the population of Bunkyou 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. Bunkyou is one of the minority of Japanese municipalities projected to grow through 2050.
Q.What is the aging rate of Bunkyou?
A.Bunkyou's aging rate (percentage aged 65 and over) is 18.7% as of 2020, projected to rise to 26.0% 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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