Japan Population Decline Simulator

Aichi愛知県

Toyoyama 豊山町

Data last updated:

Toyoyama, Aichi, Japan has a population of 15,784 (2025 national census). IPSS projections estimate 16,018 by 2030 and 15,363 by 2050 (a decrease of about 1.6% from 2020), with the share of residents aged 65+ rising from 23.0% in 2020 to 30.0%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)

2025Census

15,784

2030Projection

16,018

▲ +2.6%

2040Projection

15,829

▲ +1.4%

2050Projection

15,363

▼ -1.6%

Change vs. 2020 census

Elderly Rate (65+): 2020 23%→2050 30%

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Other municipalities in Aichi (愛知県)

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.

Toyoyama 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
198013,693▼ -12.3%Census
198513,791▼ -11.7%Census
199013,213▼ -15.4%Census
199513,513▼ -13.5%Census
200013,001▼ -16.7%Census
200513,565▼ -13.1%Census
201014,405▼ -7.7%Census
201515,177▼ -2.8%Census
202015,613—Census
202515,784▲ +1.1%Census
203016,018▲ +2.6%Projection
203515,980▲ +2.4%Projection
204015,829▲ +1.4%Projection
204515,623▲ +0.1%Projection
205015,363▼ -1.6%Projection

About Toyoyama

Overview

Toyoyama (豊山町) is a municipality in Aichi, Japan, with a population of 15,784 as of 2025.

Population Projection of Toyoyama

According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Toyoyama's population is expected to reach 16,018 by 2030 (+2.6%), 15,829 by 2040 (+1.4%), and 15,363 by 2050 (-1.6%). A modest population change is expected.

Aging Rate of Toyoyama

The aging rate (percentage of residents aged 65 and over) is 23.0% as of 2020 and is projected to rise to 30.0% by 2050. The aging rate will remain below the most severe Japanese averages.

National Comparison

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

National and Prefectural Rank

  • Population decline rate: Ranked #1778 out of 1903 municipalities nationwide.
  • Aging rate in 2050: Ranked #1832 out of 1903 nationwide.
  • Population size: Ranked #1165 out of 1917 nationwide.
  • Related: National rankings / All municipalities in Aichi

Earnings in Aichi (愛知県): Average salary in Aichi (愛知県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure

Frequently Asked Questions

Q.What is the current population of Toyoyama, Aichi?
A.According to the 2025 national census, Toyoyama has a population of 15,784.
Q.What is the population of Toyoyama in 2026?
A.Toyoyama's population in 2026 is estimated at approximately 15,831. This is an interpolated reference value between the 2025 census (15,784) and the IPSS projection for 2030 (16,018).
Q.What is the projected population of Toyoyama in the future?
A.According to IPSS projections, Toyoyama's population is expected to be 16,018 in 2030, 15,829 in 2040, and 15,363 in 2050.
Q.What is the population decline rate of Toyoyama?
A.Over the 30 years from 2020 to 2050, Toyoyama's population is projected to change by -1.6%. The 10-year change is +2.6% and the 20-year change is +1.4%.
Q.Why is the population of Toyoyama declining?
A.Nationwide, Japan's population decline is driven by natural decrease (deaths exceeding births) and, in regional municipalities, by net out-migration of young people to major metropolitan areas. In Toyoyama, the share of residents aged 65+ is projected to rise from 23.0% to 30.0% by 2050, which further accelerates natural decrease.
Q.What is the aging rate of Toyoyama?
A.Toyoyama's aging rate (percentage aged 65 and over) is 23.0% as of 2020, projected to rise to 30.0% 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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