Tomakomai: population and official figures
In depth
- Economy, jobs and prices in Tomakomai: Taxable income for municipal resident tax in Tomakomai averaged 3.31 million yen per taxpayer in fiscal 2024, 44th 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 Tomakomai: Tomakomai had 10 general hospitals (hospitals other than psychiatric ones) in 2023, or 5.88 per 100,000 residents, 94th highest of 262 cities, above the national figure (5.60).
- Education in Tomakomai: Tomakomai had 22 primary schools with 8,046 pupils and 600 full-time teachers in May 2024.
- Poverty and living standards in Tomakomai: 39.6% of private households in Tomakomai were one-person households at the 2020 census (31,627), 57th highest of 262 cities, above the national figure (38.0%).
- Government budget and revenue in Tomakomai: The municipal government of Tomakomai took in 85.9 billion yen in fiscal 2022 (final accounts), 505,141 yen per resident, 81st highest of 262 cities.
What is the population of Tomakomai?
Tomakomai had 170,113 residents at the 1 October 2020 census (city proper). That is 126th lowest of 262 cities. The count includes foreign residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow big is Tomakomai and how densely populated is it?
Tomakomai covers 561.66 square kilometres (2024), of which 231.37 is habitable land. That is 303 people per square kilometre of total area at the 2020 census, 34th lowest of 262 for density.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyIs the population of Tomakomai growing or shrinking?
The basic resident register recorded 165,590 residents in Tomakomai in 2024, 2.7% 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 Tomakomai?
12.0% of residents of Tomakomai were under 15 (20,426 children) and 56.9% 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 Tomakomai?
Tomakomai had 80,130 households at the 2020 census, of which 79,962 were private households; that is about 2.12 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 Tomakomai?
722 foreign nationals lived in Tomakomai at the 2020 census, 0.4% 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 Tomakomai each year?
Tomakomai recorded 891 births and 2,199 deaths in 2023, a natural decrease of 1,308. That is 5.2 births and 12.9 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 Tomakomai?
In 2024, 5,607 people moved into Tomakomai from other municipalities and 5,601 moved out, a net gain of 6 (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 Tomakomai each year?
Tomakomai registered 633 marriages and 357 divorces by Japanese nationals in 2023, or 3.7 marriages per 1,000 residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyWho runs Tomakomai?
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
- Tottori 188,465
- Joetsu 188,047
- Anjo 187,990
- Toyokawa 184,661
- Izumi 184,495
- Tachikawa 183,581
- Uji 179,630
- Narashino 176,197
- Hitachi 174,508
- Izumo 172,775
- Kamakura 172,710
- Urayasu 171,362
- Nishio 169,046
- Sakura 168,743
- Hirosaki 168,466
- Iwata 166,672
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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