Kōtō

Kōtō
江東区
Kōtō City
Great Harumi Bridge in Kōtō
Location of Kōtō in Tokyo
Kōtō
Location in Japan
Coordinates: 35°40′N 139°49′E / 35.667°N 139.817°E / 35.667; 139.817
CountryJapan
RegionKantō
PrefectureTokyo
Government
  MayorTomoka Okubo (from December 11, 2023)
Area
  Total
42.99 km2 (16.60 sq mi)
Population
 (May 1, 2025)
  Total
543,730
  Density12,648/km2 (32,760/sq mi)
Time zoneUTC+09:00 (JST)
City office4-11-28 Toyo, Koto City, Tokyo, Japan
135-8383
Websitewww.city.koto.lg.jp (in Japanese)

Kōtō (江東区, Kōtō-ku) is a special ward in the Tokyo Metropolis in Japan. The ward refers to itself as Kōtō City in English. As of May 1, 2025, the ward has an estimated population of 543,730, and a population density of 12,648/km2 (32,760/sq mi). The total area is 42.99 km2 (16.60 sq mi).

Kōtō is located east of the Tokyo metropolitan center, bounded by the Sumida River to the west and the Arakawa River to the east. Its major districts include Kameido, Kiba, Kiyosumi, Monzen-nakachō, Shirakawa, and Toyosu. The waterfront area of Ariake is in Kōtō, as is part of Odaiba.