Hokkaido北海道
Muroran 室蘭市
Data last updated:
Muroran, Hokkaido, Japan has a population of 73,913 (2025 national census). IPSS projections estimate 68,701 by 2030 and 46,571 by 2050 (a decrease of about 43.5% from 2020), with the share of residents aged 65+ rising from 37.1% in 2020 to 42.2%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
73,913
2030
(Projection)
68,701
▼ -16.6%
2040
(Projection)
56,663
▼ -31.2%
2050
(Projection)
46,571
▼ -43.5%
Change vs. 2020 census
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Other municipalities in Hokkaido (北海道)
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.
Muroran Population Table (1980–2050)
Population by year: national census results (restated to current municipal boundaries) and IPSS (2023) projections based on the 2020 census.
| Year | Population | vs 2020 | Type |
|---|---|---|---|
| 1980 | 150,199 | ▲ +82.3% | Census |
| 1985 | 136,208 | ▲ +65.3% | Census |
| 1990 | 117,855 | ▲ +43.1% | Census |
| 1995 | 109,766 | ▲ +33.2% | Census |
| 2000 | 103,278 | ▲ +25.4% | Census |
| 2005 | 98,372 | ▲ +19.4% | Census |
| 2010 | 94,535 | ▲ +14.8% | Census |
| 2015 | 88,564 | ▲ +7.5% | Census |
| 2020 | 82,383 | — | Census |
| 2025 | 73,913 | ▼ -10.3% | Census |
| 2030 | 68,701 | ▼ -16.6% | Projection |
| 2035 | 62,540 | ▼ -24.1% | Projection |
| 2040 | 56,663 | ▼ -31.2% | Projection |
| 2045 | 51,339 | ▼ -37.7% | Projection |
| 2050 | 46,571 | ▼ -43.5% | Projection |
About Muroran
Overview
Muroran (室蘭市) is a municipality in Hokkaido, Japan, with a population of 73,913 as of 2025.
Population Projection of Muroran
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Muroran's population is expected to reach 68,701 by 2030 (-16.6%), 56,663 by 2040 (-31.2%), and 46,571 by 2050 (-43.5%). A significant population decline is projected over the next three decades.
Aging Rate of Muroran
The aging rate (percentage of residents aged 65 and over) is 37.1% as of 2020 and is projected to rise to 42.2% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Muroran is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #583 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1073 out of 1903 nationwide.
- Population size: Ranked #523 out of 1917 nationwide.
- Related: National rankings / All municipalities in Hokkaido
Earnings in Hokkaido (北海道): Average salary in Hokkaido (北海道) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure