Ichinomiya is a Japanese historical term referring to the Shinto shrines with the highest rank in a province. Shrines of lower rank were designated ninomiya , sannomiya , shinomiya , and so forth.

Ichinomiya is a city located in Aichi Prefecture, Japan. The city is sometimes called Owarichinomiya to avoid confusion with other municipalities of the same name, including Ichinomiya and Ichinomiya in Chiba Prefecture. As of 1 October 2019, the city had an estimated population of 379,654 in 161,434 households, and a population density of 3,336 persons per km2. The total area of the city was 113.82 square kilometres (43.95 sq mi).