In principle, ichinomiya was granted to one shrine in one country, but there are cases where there are multiple ichinomiya in one country due to a battle for shrine status.
The head shrine of Hachiman worship, of which there are said to be more than 25,000 throughout Japan, is Usa Jingu Shrine in Oita Prefecture, which was built in 725.
The deity of Hiyoshi Shrine, Hie Shrine, and Sanno Shrine, which have about 3,800 shrines throughout Japan, is Oyakui, also known as "Hiyoshi God" or "Sanno Gongen. The deity is also the head deity of the Matsuo faith, which has Matsuo Taisha Shrine in Kyoto as its head shrine.
Sumiyoshi Taisha Shrine in Osaka Prefecture is the head shrine of the 2,000 Sumiyoshi shrines in Japan. The three Sumiyoshi deities were worshipped as gods of navigation and purification.
In the Heian period (794-1185), the dedication of remote shrines was avoided, and "Nijusha" was established as a new ranking of shrines, mainly those close to Kyoto.51 "Ichinomiya" was established from the late Heian to Kamakura periods, and is the most prestigious shrine in each country (Ritsuryo/Kokugyo).
Since the center of the torii gate and the approach to the shrine is considered to be the path of the gods, it is customary to pass by either side of the gate.
The gojintai, the central object of a shrine, is also called "yoriyoshiro," and the place or object where the deity dwells varies from shrine to shrine.
There are more than 2,000 single shrines that do not belong to the Honcho, including Nikko Toshogu Shrine, Meiji Shrine, Yasukuni Shrine, and Fushimi Inari Taisha Shrine.
The basic architectural style of shrine pavilions is the gabled gabled roof, which can be broadly divided into the "Shinmei-zukuri" style, which has its roots in the Ise Jingu Shrine, and the "Taisha-zukuri" style, which has its roots in the Izumo-Taisha Shrine.