Iwakuni: population and official figures
In depth
- Economy, jobs and prices in Iwakuni: Taxable income for municipal resident tax in Iwakuni averaged 3.35 million yen per taxpayer in fiscal 2024, 57th lowest of 262 cities and below the national average of 3,933.7 thousand yen per taxpayer. It is income before deductions, so it is not take-home pay.
- Health in Iwakuni: Iwakuni had 15 general hospitals (hospitals other than psychiatric ones) in 2023, or 11.62 per 100,000 residents, 9th highest of 262 cities, above the national figure (5.60).
- Education in Iwakuni: Iwakuni had 38 primary schools with 5,608 pupils and 469 full-time teachers in May 2024.
- Poverty and living standards in Iwakuni: 35.8% of private households in Iwakuni were one-person households at the 2020 census (20,672), 118th highest of 262 cities, below the national figure (38.0%).
- Government budget and revenue in Iwakuni: The municipal government of Iwakuni took in 71.9 billion yen in fiscal 2022 (final accounts), 556,716 yen per resident, 47th highest of 262 cities.
What is the population of Iwakuni?
Iwakuni had 129,125 residents at the 1 October 2020 census (city proper). That is 69th lowest of 262 cities. The count includes foreign residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow big is Iwakuni and how densely populated is it?
Iwakuni covers 873.67 square kilometres (2024), of which 161.87 is habitable land. That is 148 people per square kilometre of total area at the 2020 census, 8th lowest of 262 for density.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyIs the population of Iwakuni growing or shrinking?
The basic resident register recorded 124,568 residents in Iwakuni in 2024, 3.5% fewer than the 2020 census count (all municipalities together: -1.4%). The register and the census are counted differently, so the change is indicative.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow many children live in Iwakuni?
11.2% of residents of Iwakuni were under 15 (14,495 children) and 52.1% were aged 15 to 64 at the 2020 census; nationally the shares were 11.9% and 57.8%.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow many households are there in Iwakuni?
Iwakuni had 57,911 households at the 2020 census, of which 57,762 were private households; that is about 2.23 residents per household (residents divided by all households).
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow many foreigners live in Iwakuni?
1,769 foreign nationals lived in Iwakuni at the 2020 census, 1.4% of residents, below the national figure (1.9%).
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow many babies are born in Iwakuni each year?
Iwakuni recorded 656 births and 2,169 deaths in 2023, a natural decrease of 1,513. That is 5.1 births and 16.8 deaths per 1,000 residents (national: 5.8 and 12.5). Births are by Japanese nationals registered in the city.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyAre more people moving into or out of Iwakuni?
In 2024, 3,434 people moved into Iwakuni from other municipalities and 4,241 moved out, a net loss of 807 (moves within the city and from abroad are not counted).
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow many marriages are there in Iwakuni each year?
Iwakuni registered 447 marriages and 181 divorces by Japanese nationals in 2023, or 3.5 marriages per 1,000 residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyWho runs Iwakuni?
In Japan, cities and towns are run by municipalities: Mayor and municipal assembly both directly elected for four years. Primary and lower secondary schools, welfare, waste, water, residents' registers, disaster response. Large 'designated cities' (20) take on prefectural tasks and are divided into administrative wards whose heads are officials, not elected.
How local power works in Japan
Cities of a similar size in Japan
- Minoh 136,868
- Yaizu 136,845
- Ebina 136,516
- Kisarazu 136,166
- Inazawa 134,751
- Isahaya 133,852
- Ome 133,535
- Narita 132,906
- Zama 132,325
- Onomichi 131,170
- Abiko 130,510
- Kokubunji 129,242
- Fujinomiya 128,105
- Seto 127,792
- Osaki 127,330
- Iizuka 126,364
Up a level: all cities in Japan · Japan · government and power
Sources
- Statistics Bureau of Japan, Ministry of Internal Affairs and Communications: Statistical Observations of Municipalities 2026 (social and demographic statistics, city, ward, town and village data), read 28 October 2026 · saved copy (SHA-256 2cb3d8c51aa1…)
- Statistics Bureau of Japan, Ministry of Internal Affairs and Communications: Statistical Observations of Prefectures 2026 (national figures, "All Japan" row), read 28 October 2026 · saved copy (SHA-256 b69774a5f40c…)
Each saved copy is the file exactly as downloaded, kept so the figures can be checked even if the source changes. Report an error.