Totsuka-ku is one of the 18 wards of the city of Yokohama in Kanagawa Prefecture, Japan. As of 2010, the ward had an estimated population of 273,418 and a density of 7,640 persons per km². The total area was 35.70 km².GeographyTotsuka Ward is located in eastern Kanagawa Prefecture, and in the center-western area of the city of Yokohama. The area is largely flatland, with scattered small hills. The Kashio River passes through the Ward.Surrounding municipalitiesSakae WardHodagaya WardMinami WardAsahi WardKōnan WardIzumi WardKamakuraFujisawa