Iwata: population and official figures
In depth
- Economy, jobs and prices in Iwata: Taxable income for municipal resident tax in Iwata averaged 3.43 million yen per taxpayer in fiscal 2024, 74th 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 Iwata: Iwata had 6 general hospitals (hospitals other than psychiatric ones) in 2023, or 3.60 per 100,000 residents, 65th lowest of 262 cities, below the national figure (5.60).
- Education in Iwata: Iwata had 22 primary schools with 8,524 pupils and 587 full-time teachers in May 2024.
- Poverty and living standards in Iwata: 29.5% of private households in Iwata were one-person households at the 2020 census (19,177), 39th lowest of 262 cities, below the national figure (38.0%).
- Government budget and revenue in Iwata: The municipal government of Iwata took in 70.4 billion yen in fiscal 2022 (final accounts), 422,338 yen per resident, 86th lowest of 262 cities.
What is the population of Iwata?
Iwata had 166,672 residents at the 1 October 2020 census (city proper). That is 122nd lowest of 262 cities. The count includes foreign residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow big is Iwata and how densely populated is it?
Iwata covers 163.45 square kilometres (2024), of which 136.74 is habitable land. That is 1,020 people per square kilometre of total area at the 2020 census, 107th lowest of 262 for density.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyIs the population of Iwata growing or shrinking?
The basic resident register recorded 165,426 residents in Iwata 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 Iwata?
12.9% of residents of Iwata were under 15 (21,544 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 Iwata?
Iwata had 65,059 households at the 2020 census, of which 64,969 were private households; that is about 2.56 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 Iwata?
7,346 foreign nationals lived in Iwata at the 2020 census, 4.4% of residents, above the national figure (1.9%).
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow many babies are born in Iwata each year?
Iwata recorded 849 births and 1,917 deaths in 2023, a natural decrease of 1,068. That is 5.1 births and 11.5 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 Iwata?
In 2024, 5,148 people moved into Iwata from other municipalities and 5,418 moved out, a net loss of 270 (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 Iwata each year?
Iwata registered 542 marriages and 213 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 Iwata?
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
- Izumi 184,495
- Tachikawa 183,581
- Uji 179,630
- Narashino 176,197
- Hitachi 174,508
- Izumo 172,775
- Kamakura 172,710
- Urayasu 171,362
- Tomakomai 170,113
- Nishio 169,046
- Sakura 168,743
- Hirosaki 168,466
- Oyama 166,666
- Obihiro 166,536
- Takaoka 166,393
- Niiza 166,017
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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