Japan Population Decline Simulator

Kagawa香川県

Shoudoshima 小豆島町

Data last updated:

Shoudoshima, Kagawa, Japan has a population of 13,889 (2020 national census). IPSS projections estimate 11,427 by 2030 and 7,598 by 2050 (a decrease of about 45.3% from 2020), with the share of residents aged 65+ rising from 44.1% to 51.9%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)

2020

(Census)

13,889

2030

(Projection)

11,427

-17.7%

2040

(Projection)

9,344

-32.7%

2050

(Projection)

7,598

-45.3%

Elderly Rate (65+): 2020 44.1%2050 51.9%

Other municipalities in Kagawa (香川県)

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.

Shoudoshima Population Projection Table (2020–2050)

Population by year, based on the national census and IPSS (2023) projections.

YearPopulationvs 2020Type
202013,889Census
202512,569▼ -9.5%Projection
203011,427▼ -17.7%Projection
203510,349▼ -25.5%Projection
20409,344▼ -32.7%Projection
20458,441▼ -39.2%Projection
20507,598▼ -45.3%Projection

About Shoudoshima

Overview

Shoudoshima (小豆島町) is a municipality in Kagawa, Japan, with a population of 13,889 as of 2020.

Population Projection of Shoudoshima

According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Shoudoshima's population is expected to reach 11,427 by 2030 (-17.7%), 9,344 by 2040 (-32.7%), and 7,598 by 2050 (-45.3%). A significant population decline is projected over the next three decades.

Aging Rate of Shoudoshima

The aging rate (percentage of residents aged 65 and over) is 44.1% as of 2020 and is projected to rise to 51.9% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.

National Comparison

Shoudoshima is experiencing one of the faster rates of population decline in Japan.

National and Prefectural Rank

  • Population decline rate: Ranked #522 out of 1916 municipalities nationwide.
  • Aging rate in 2050: Ranked #431 out of 1916 nationwide.
  • Population size: Ranked #1262 out of 1916 nationwide.
  • Related: National rankings / All municipalities in Kagawa

Frequently Asked Questions

Q.What is the current population of Shoudoshima, Kagawa?
A.According to the 2020 national census, Shoudoshima has a population of 13,889.
Q.What is the population of Shoudoshima in 2026?
A.Shoudoshima's population in 2026 is estimated at approximately 12,341. This is an interpolated reference value between the 2020 census (13,889) and the IPSS projection for 2030 (11,427).
Q.What is the projected population of Shoudoshima in the future?
A.According to IPSS projections, Shoudoshima's population is expected to be 11,427 in 2030, 9,344 in 2040, and 7,598 in 2050.
Q.What is the population decline rate of Shoudoshima?
A.Over the 30 years from 2020 to 2050, Shoudoshima's population is projected to change by -45.3%. The 10-year change is -17.7% and the 20-year change is -32.7%.
Q.Why is the population of Shoudoshima 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 Shoudoshima, the share of residents aged 65+ is projected to rise from 44.1% to 51.9% by 2050, which further accelerates natural decrease.
Q.What is the aging rate of Shoudoshima?
A.Shoudoshima's aging rate (percentage aged 65 and over) is 44.1% as of 2020, projected to rise to 51.9% 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 the 2020 national census results. Future projections use the IPSS 2023 edition. Data will be updated as new census results become available.

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