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Kochi: population and official figures

Population (2020 census)
326,545
2020

In depth

What is the population of Kochi?

Kochi had 326,545 residents at the 1 October 2020 census (city proper). That is 67th highest of 262 cities. The count includes foreign residents.

Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copy

How big is Kochi and how densely populated is it?

Kochi covers 309.00 square kilometres (2024), of which 136.37 is habitable land. That is 1,057 people per square kilometre of total area at the 2020 census, 110th lowest of 262 for density.

Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copy

Is the population of Kochi growing or shrinking?

The basic resident register recorded 312,228 residents in Kochi in 2024, 4.4% 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 copy

What share of the population of Kochi is over 65?

29.4% of the residents of Kochi were aged 65 or over at the 2020 census (95,909 people), 94th oldest of 262 cities, above the national figure (28.0%).

Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copy

How many children live in Kochi?

11.7% of residents of Kochi were under 15 (38,125 children) and 56.0% 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 copy

How many households are there in Kochi?

Kochi had 154,171 households at the 2020 census, of which 153,809 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 copy

How many foreigners live in Kochi?

1,493 foreign nationals lived in Kochi at the 2020 census, 0.5% of residents, below the national figure (1.9%).

Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copy

How many babies are born in Kochi each year?

Kochi recorded 1,792 births and 4,295 deaths in 2023, a natural decrease of 2,503. That is 5.5 births and 13.2 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 copy

Are more people moving into or out of Kochi?

In 2024, 7,584 people moved into Kochi from other municipalities and 9,294 moved out, a net loss of 1,710 (moves within the city and from abroad are not counted).

Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copy

How many marriages are there in Kochi each year?

Kochi registered 1,090 marriages and 598 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 copy

Notes from the UN table: Excluding diplomatic personnel outside the country and foreign military and civilian personnel and their dependants stationed in the area. For the 2020 census, urban areas are “Densely Inhabited Districts”, defined as areas within a municipality that is composed of a group of contiguous Basic Unit Blocks, each of which has a population density of 4,000 inhabitants or more per square kilometer and whose total population exceeds 5,000 as of 1 October 2020. The detailed methodological explanation is available at https://www.stat.go.jp/english/data/chiri/did/1-1.html Excluding diplomatic personnel outside the country and foreign military and civilian personnel and their dependants stationed in the area. For the 2020 census, urban areas are “Densely Inhabited Districts”, defined as areas within a municipality that is composed of a group of contiguous Basic Unit Blocks, each of which has a population density of 4,000 inhabitants or more per square kilometer and whose total population exceeds 5,000 as of 1 October 2020. The detailed methodological explanation is available at https://www.stat.go.jp/english/data/chiri/did/1-1.html Excluding diplomatic personnel outside the country and foreign military and civilian personnel and their dependants stationed in the area. For the 2020 census, urban areas are “Densely Inhabited Districts”, defined as areas within a municipality that is composed of a group of contiguous Basic Unit Blocks, each of which has a population density of 4,000 inhabitants or more per square kilometer and whose total population exceeds 5,000 as of 1 October 2020. The detailed methodological explanation is available at https://www.stat.go.jp/english/data/chiri/did/1-1.html Land areas are based on the "Municipalities Area Statistics of Japan, 2015" published by the Geospatial Information Authority of Japan, Ministry of Land, Infrastructure, Transport and Tourism.

Who runs Kochi?

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

Up a level: all cities in Japan · Japan · government and power

Sources

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