is one of the 18 wards of the city of Yokohama in Kanagawa Prefecture, Japan. As of March 1, 2012, the ward had an estimated population of 332,488, with 156,198 households and a population density of 10,588.79 persons per km<sup>2</sup>. The total area was 31.40 km<sup>2</sup>. KÃ Âhoku Ward has the largest population of Yokohama's 18 wards, and ranks second to Naka Ward in the total number of workplaces.
KÃ Âhoku Ward is located in eastern Kanagawa Prefecture, and on the northeastern borders of the city of Yokohama.
The area around present-day Kà Âhoku Ward was formerly part of Tsuzuki District in Musashi Province. During the Edo period, it was a rural region classified as tenryà  territory controlled directly by the Tokugawa shogunate, but administered through various hatamoto. After the Meiji Restoration, the area became part of the new Kanagawa Prefecture in 1868. In the cadastral reform of April 1, 1889, the area was divided into numerous villages. In April 1939, it was annexed by the neighboring city of Yokohama.
KÃ Âhoku Ward is largely a regional commercial center and bedroom community for central Yokohama, Kawasaki and Tokyo.
Companies headquartered in the ward include:
Kanagawa Prefectural Board of Education operates prefectural high schools:
Private high schools:
The operates municipal elementary and junior high schools.
Municipal junior high schools:
Municipal elementary schools:
Additionally, the zones of Higashi Hongo Elementary School (æ±æŽ·å°Âå¦校), Kamihashi Elementary School () and Shirahata Elementary School (), not in Kohoku-ku, include portions of Kohoku-ku.
An airport limousine bus service operates between Shin-Yokohama Prince Hotel and Shin-Yokohama Station and Narita Airport.