Utsunomiya is the capital and largest city of Tochigi Prefecture in the northern Kantō region of Japan. As of 1 July 2023, the city had an estimated population of 513,584, and a population density of 1,232 persons per square kilometre (3,190/sq mi). The total area of the city is 416.85 km2 (160.95 sq mi). Utsunomiya is famous for its gyoza. There are more than two hundred gyoza restaurants in Utsunomiya.

Tochigi Prefecture is a landlocked prefecture of Japan located in the Kantō region of Honshu. Tochigi Prefecture has a population of 1,897,649 and has a geographic area of 6,408 km². Tochigi Prefecture borders Fukushima Prefecture to the north, Gunma Prefecture to the west, Saitama Prefecture to the south, and Ibaraki Prefecture to the southeast.