Japan Population Decline Simulator

Kagawa香川県

Marugame 丸亀市

Data last updated:

Marugame, Kagawa, Japan has a population of 106,687 (2025 national census). IPSS projections estimate 105,335 by 2030 and 92,784 by 2050 (a decrease of about 15.3% from 2020), with the share of residents aged 65+ rising from 29.0% in 2020 to 36.8%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)

2025Census

106,687

2030Projection

105,335

▼ -3.8%

2040Projection

99,533

▼ -9.1%

2050Projection

92,784

▼ -15.3%

Change vs. 2020 census

Elderly Rate (65+): 2020 29%→2050 36.8%

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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.

Marugame 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
198094,849▼ -13.4%Census
198599,628▼ -9.0%Census
1990101,253▼ -7.5%Census
1995106,107▼ -3.1%Census
2000108,356▼ -1.1%Census
2005110,085▲ +0.5%Census
2010110,473▲ +0.9%Census
2015110,010▲ +0.5%Census
2020109,513—Census
2025106,687▼ -2.6%Census
2030105,335▼ -3.8%Projection
2035102,592▼ -6.3%Projection
204099,533▼ -9.1%Projection
204596,199▼ -12.2%Projection
205092,784▼ -15.3%Projection

About Marugame

Overview

Marugame (丸亀市) is a municipality in Kagawa, Japan, with a population of 106,687 as of 2025.

Population Projection of Marugame

According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Marugame's population is expected to reach 105,335 by 2030 (-3.8%), 99,533 by 2040 (-9.1%), and 92,784 by 2050 (-15.3%). A modest population change is expected.

Aging Rate of Marugame

The aging rate (percentage of residents aged 65 and over) is 29.0% as of 2020 and is projected to rise to 36.8% by 2050. The aging rate will remain below the most severe Japanese averages.

National Comparison

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

National and Prefectural Rank

  • Population decline rate: Ranked #1476 out of 1903 municipalities nationwide.
  • Aging rate in 2050: Ranked #1498 out of 1903 nationwide.
  • Population size: Ranked #397 out of 1917 nationwide.
  • Related: National rankings / All municipalities in Kagawa

Earnings in Kagawa (香川県): Average salary in Kagawa (香川県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure

Frequently Asked Questions

Q.What is the current population of Marugame, Kagawa?
A.According to the 2025 national census, Marugame has a population of 106,687.
Q.What is the population of Marugame in 2026?
A.Marugame's population in 2026 is estimated at approximately 106,417. This is an interpolated reference value between the 2025 census (106,687) and the IPSS projection for 2030 (105,335).
Q.What is the projected population of Marugame in the future?
A.According to IPSS projections, Marugame's population is expected to be 105,335 in 2030, 99,533 in 2040, and 92,784 in 2050.
Q.What is the population decline rate of Marugame?
A.Over the 30 years from 2020 to 2050, Marugame's population is projected to change by -15.3%. The 10-year change is -3.8% and the 20-year change is -9.1%.
Q.Why is the population of Marugame 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 Marugame, the share of residents aged 65+ is projected to rise from 29.0% to 36.8% by 2050, which further accelerates natural decrease.
Q.What is the aging rate of Marugame?
A.Marugame's aging rate (percentage aged 65 and over) is 29.0% as of 2020, projected to rise to 36.8% 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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