Isahaya: population and official figures
In depth
- Economy, jobs and prices in Isahaya: Taxable income for municipal resident tax in Isahaya averaged 3.21 million yen per taxpayer in fiscal 2024, 27th 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 Isahaya: Isahaya had 15 general hospitals (hospitals other than psychiatric ones) in 2023, or 11.21 per 100,000 residents, 11th highest of 262 cities, above the national figure (5.60).
- Education in Isahaya: Isahaya had 28 primary schools with 7,272 pupils and 520 full-time teachers in May 2024.
- Poverty and living standards in Isahaya: 29.3% of private households in Isahaya were one-person households at the 2020 census (15,562), 36th lowest of 262 cities, below the national figure (38.0%).
- Government budget and revenue in Isahaya: The municipal government of Isahaya took in 74.4 billion yen in fiscal 2022 (final accounts), 555,606 yen per resident, 48th highest of 262 cities.
What is the population of Isahaya?
Isahaya had 133,852 residents at the 1 October 2020 census (city proper). That is 76th lowest of 262 cities. The count includes foreign residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow big is Isahaya and how densely populated is it?
Isahaya covers 341.79 square kilometres (2024), of which 196.79 is habitable land. That is 392 people per square kilometre of total area at the 2020 census, 51st lowest of 262 for density.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyIs the population of Isahaya growing or shrinking?
The basic resident register recorded 133,479 residents in Isahaya in 2024, 0.3% 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 Isahaya?
13.4% of residents of Isahaya were under 15 (17,924 children) and 56.0% 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 Isahaya?
Isahaya had 53,235 households at the 2020 census, of which 53,050 were private households; that is about 2.51 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 Isahaya?
866 foreign nationals lived in Isahaya at the 2020 census, 0.6% 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 Isahaya each year?
Isahaya recorded 816 births and 1,840 deaths in 2023, a natural decrease of 1,024. That is 6.1 births and 13.7 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 Isahaya?
In 2024, 5,089 people moved into Isahaya from other municipalities and 4,836 moved out, a net gain of 253 (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 Isahaya each year?
Isahaya registered 448 marriages and 174 divorces by Japanese nationals in 2023, or 3.3 marriages per 1,000 residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyWho runs Isahaya?
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
- Fukaya 141,268
- Asaka 141,083
- Toda 140,899
- Ishinomaki 140,151
- Koga 139,344
- Kuwana 138,613
- Shunan 137,540
- Minoh 136,868
- Yaizu 136,845
- Ebina 136,516
- Kisarazu 136,166
- Inazawa 134,751
- Ome 133,535
- Narita 132,906
- Zama 132,325
- Onomichi 131,170
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…)
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