Osaki: population and official figures
In depth
- Economy, jobs and prices in Osaki: Taxable income for municipal resident tax in Osaki averaged 3.09 million yen per taxpayer in fiscal 2024, 12th 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 Osaki: Osaki had 12 general hospitals (hospitals other than psychiatric ones) in 2023, or 9.42 per 100,000 residents, 23rd highest of 262 cities, above the national figure (5.60).
- Education in Osaki: Osaki had 18 primary schools with 5,689 pupils and 422 full-time teachers in May 2024.
- Poverty and living standards in Osaki: 29.9% of private households in Osaki were one-person households at the 2020 census (14,570), 43rd lowest of 262 cities, below the national figure (38.0%).
- Government budget and revenue in Osaki: The municipal government of Osaki took in 75.0 billion yen in fiscal 2022 (final accounts), 588,699 yen per resident, 28th highest of 262 cities.
What is the population of Osaki?
Osaki had 127,330 residents at the 1 October 2020 census (city proper). That is 66th lowest of 262 cities. The count includes foreign residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow big is Osaki and how densely populated is it?
Osaki covers 796.81 square kilometres (2024), of which 375.63 is habitable land. That is 160 people per square kilometre of total area at the 2020 census, 9th lowest of 262 for density.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyIs the population of Osaki growing or shrinking?
The basic resident register recorded 122,035 residents in Osaki in 2024, 4.2% 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 Osaki?
11.8% of residents of Osaki were under 15 (15,025 children) and 57.1% 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 Osaki?
Osaki had 48,893 households at the 2020 census, of which 48,775 were private households; that is about 2.60 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 Osaki?
726 foreign nationals lived in Osaki 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 Osaki each year?
Osaki recorded 626 births and 1,900 deaths in 2023, a natural decrease of 1,274. That is 4.9 births and 14.9 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 Osaki?
In 2024, 3,117 people moved into Osaki from other municipalities and 3,657 moved out, a net loss of 540 (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 Osaki each year?
Osaki registered 383 marriages and 184 divorces by Japanese nationals in 2023, or 3.0 marriages per 1,000 residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyWho runs Osaki?
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
- 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
- Iwakuni 129,125
- Fujinomiya 128,105
- Seto 127,792
- Iizuka 126,364
- Koganei 126,074
- Uruma 125,303
- Kirishima 123,135
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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