The ancient provincial capital (Hitachi Kokufu) and temple (Hitachi Kokubun-ji) were located near modern Ishioka and have been excavated, while the chief shrine was further east at Kashima (Kashima Shrine). The province was established in the 7th century.
In the Sengoku period the area was divided among several daimyōs, but the chief castle was usually in the Mito Castle of the modern city of Mito.
In Edo period, one of the clans originating from Tokugawa Ieyasu, settled in the Mito Domain, known as Mito Tokugawa family or Mito Clan. Mito Domain, was a Japanese domain of the Edo period it was associated with Hitachi Province.
In Meiji era the political maps of the provinces of Japan were reformed in the 1870s, and the provinces became prefectures, and also some provinces were modified or merged, when creating the prefectures.
Kōchi District (河内郡, こうちぐん、かわちぐん (Kōchi-gun, Kawachi-gun)) - merged with Shida District to become Inashiki District (稲敷郡) on March 29, 1896 - Kōchi dissolved
Dai Nihonshi (Great History of Japan), in the 17th century Tokugawa Mitsukuni beginning his composition, work was continued until its completion in the Meiji era.
