Niiza: population and official figures
In depth
- Economy, jobs and prices in Niiza: Taxable income for municipal resident tax in Niiza averaged 3.88 million yen per taxpayer in fiscal 2024, 80th highest 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 Niiza: Niiza had 6 general hospitals (hospitals other than psychiatric ones) in 2023, or 3.61 per 100,000 residents, 67th lowest of 262 cities, below the national figure (5.60).
- Education in Niiza: Niiza had 17 primary schools with 8,459 pupils and 509 full-time teachers in May 2024.
- Poverty and living standards in Niiza: 36.2% of private households in Niiza were one-person households at the 2020 census (26,654), 106th highest of 262 cities, below the national figure (38.0%).
- Government budget and revenue in Niiza: The municipal government of Niiza took in 65.4 billion yen in fiscal 2022 (final accounts), 393,652 yen per resident, 37th lowest of 262 cities.
What is the population of Niiza?
Niiza had 166,017 residents at the 1 October 2020 census (city proper). That is 118th lowest of 262 cities. The count includes foreign residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow big is Niiza and how densely populated is it?
Niiza covers 22.78 square kilometres (2024), of which 21.70 is habitable land. That is 7,288 people per square kilometre of total area at the 2020 census, 38th highest of 262 for density.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyIs the population of Niiza growing or shrinking?
The basic resident register recorded 166,412 residents in Niiza in 2024, 0.2% more 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 Niiza?
12.6% of residents of Niiza were under 15 (20,924 children) and 59.4% 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 Niiza?
Niiza had 73,686 households at the 2020 census, of which 73,634 were private households; that is about 2.25 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 Niiza?
2,985 foreign nationals lived in Niiza at the 2020 census, 1.8% 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 Niiza each year?
Niiza recorded 992 births and 1,828 deaths in 2023, a natural decrease of 836. That is 6.0 births and 11.0 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 Niiza?
In 2024, 8,000 people moved into Niiza from other municipalities and 6,830 moved out, a net gain of 1,170 (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 Niiza each year?
Niiza registered 533 marriages and 201 divorces by Japanese nationals in 2023, or 3.2 marriages per 1,000 residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyWho runs Niiza?
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
- Hitachi 174,508
- Izumo 172,775
- Kamakura 172,710
- Urayasu 171,362
- Tomakomai 170,113
- Nishio 169,046
- Sakura 168,743
- Hirosaki 168,466
- Iwata 166,672
- Oyama 166,666
- Obihiro 166,536
- Takaoka 166,393
- Kushiro 165,077
- Ube 162,570
- Hadano 162,439
- Miyakonojo 160,640
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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