Topics
Ota, 
Japan
237,865 people lived in Ota in 2025. It is the 2460th largest of the world's 12,138 cities, and the 35th largest in Japan.
The UN measures every city in the world the same way, by where the buildings are rather than where the boundary runs, so this figure and Ota's own can differ widely. What counts as a city here.
Verified 2026-09-30 · 73 canaries
People · every five years · 1975 to 2050
How Ota grew
Where Ota had 10 people in 1975, it had 9.4 in 2025, fewer than it started with.
On the UN's projection it will have 204,644 people in 2050.
projected (after 2025) · how sure the UN is: high moderate low
How to read this: read it left to right, 1975 to 2050, one column every five years, the height being people. Hatching marks the projected years. Below, a strip of the UN's confidence: strong colour where the census maps are recent and detailed, pale where they are not, blank where the place was not counted as a city.
People · your family's years · 1975 to 2050
Ota through your family’s years
Put in the years your family were born. You’ll see how many people lived in Ota in each of those years, and when each of them turned 30.
Japan · every city · 2025
Where it is
How to read this: Japan and its 137 cities in 2025, each a dot whose area is its number of people (the largest is Tokyo). Ota is ringed, in colour; the other cities are grey. Neighbouring countries are outlines.
Area and built-up land · km²
How much land it covers
In 2025, Ota covered 108 km², and buildings, roads and other built-up land covered 35 km² of it. That is 146 m² of built-up land for each person, about a square 12 by 12 metres. Since 1975, its built-up land has grown by 52%, and its people have fallen by 6%.
How to read this: each pale square is the city's whole area, the strong square inside it the part that is built on; one scale for all three, so a bigger square is more land. Hatched is the UN's projection.
Of every 100 people in Japan
Its share of Japan
Of every 1,000 people in Japan in 2025, 2 lived in Ota, which is 237,865 people.
How to read this: 1,000 squares, one for every 1,000th person in Japan; the coloured squares live in Ota. The grey rest live in other cities, in towns or in the countryside.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 2448 Dohrighat India239,251
- 2450 Đà Lạt Vietnam239,212
- 2458 Dosso Niger238,280
- 2459 Derudeib Sudan238,164
- 2460 Ota237,865
- 2461 Diourbel Senegal237,795
- 2463 Jinju-si South Korea237,707
- 2464 Tal Afar Iraq237,454
- 2465 Dhaka India237,385
In Japan, 2025
- 2073 Kofu280,212
- 2152 Nagano270,476
- 2229 Hakodate261,557
- 2282 Wakayama255,782
- 2460 Ota237,865
- 5014 Fujieda122,203
How to read this: the figure in front of a name is where that city stands among the 12,138 cities the UN counted in 2025, and each bar is its people, on one scale per list. Numbers are missing where a city has fewer than 300,000 people and so has no page of its own.
Apparatus
Sources and method
The figures for Ota are the UN's own, at five-year steps: an estimate for each of 1975 to 2025, then projection to 2050. Projected years are drawn hatched, and the UN publishes no range of uncertainty for a city. What a city means here, how the UN measures one, and why that number can differ from the one Ota publishes about itself: how the figures here are put together.
Sources: UN WUP 2025 · Natural Earth · flag-icons. Every source, its licence and how to cite it →
Verified 2026-09-30 · 73 canaries