Koganei: population and official figures
In depth
- Economy, jobs and prices in Koganei: Taxable income for municipal resident tax in Koganei averaged 4.87 million yen per taxpayer in fiscal 2024, 9th highest of 262 cities and above 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 Koganei: Koganei had 4 general hospitals (hospitals other than psychiatric ones) in 2023, or 3.17 per 100,000 residents, 49th lowest of 262 cities, below the national figure (5.60).
- Education in Koganei: Koganei had 10 primary schools with 6,881 pupils and 347 full-time teachers in May 2024.
- Poverty and living standards in Koganei: 48.3% of private households in Koganei were one-person households at the 2020 census (30,485), 5th highest of 262 cities, above the national figure (38.0%).
- Government budget and revenue in Koganei: The municipal government of Koganei took in 53.0 billion yen in fiscal 2022 (final accounts), 420,364 yen per resident, 82nd lowest of 262 cities.
What is the population of Koganei?
Koganei had 126,074 residents at the 1 October 2020 census (city proper). That is 64th lowest of 262 cities. The count includes foreign residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow big is Koganei and how densely populated is it?
Koganei covers 11.30 square kilometres (2024), of which 11.25 is habitable land. That is 11,157 people per square kilometre of total area at the 2020 census, 9th highest of 262 for density.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyIs the population of Koganei growing or shrinking?
The basic resident register recorded 125,174 residents in Koganei in 2024, 0.7% 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 Koganei?
11.8% of residents of Koganei were under 15 (14,879 children) and 63.8% 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 Koganei?
Koganei had 63,182 households at the 2020 census, of which 63,140 were private households; that is about 2.00 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 Koganei?
2,456 foreign nationals lived in Koganei at the 2020 census, 1.9% of residents, about the same as the national figure (1.9%).
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow many babies are born in Koganei each year?
Koganei recorded 896 births and 1,039 deaths in 2023, a natural decrease of 143. That is 7.1 births and 8.2 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 Koganei?
In 2024, 7,820 people moved into Koganei from other municipalities and 7,225 moved out, a net gain of 595 (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 Koganei each year?
Koganei registered 581 marriages and 147 divorces by Japanese nationals in 2023, or 4.6 marriages per 1,000 residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyWho runs Koganei?
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
- 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
- Osaki 127,330
- Iizuka 126,364
- Uruma 125,303
- Kirishima 123,135
- Yatsushiro 123,067
- Ise 122,765
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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