The ichinomiya of Mutsu Province

What the Japanese sources say

In Mutsu Province four shrines are involved with the title of ichinomiya, and the grounds fall into three separate lines.

For Shiogama Jinja (鹽竈神社), Mutsu Sōshagu (陸奥総社宮), the province’s sōsha — a shrine where the deities of a whole province were worshipped together — states: “Recorded in the national histories; the Ichinomiya Shosha Kongenki (一宮諸社根源記), the Shokoku Ichinomiya Jinmyōchō (諸国一宮神名帳), the Ichinomiya-ki (一宮記) and others all take this shrine to be the ichinomiya of Mutsu Province.” The grounds here are the medieval ichinomiya registers.

Tsutsukowake Jinja (都々古別神社) stands both at Baba and at Yatsuki, in Tanagura Town. Tanagura Town’s own official pages cite, for both of them, the same single entry for Shirakawa District in the Engishiki Jinmyōchō (延喜式神名帳, the register of official shrines in the Engishiki, a law code completed in 927). For Baba it is “Tsutsukowake Jinja, a single myōjin taisha of Shirakawa District in Ou Province”; for Yatsuki, “a great shrine of Shirakawa District appearing in the Engishiki Jinmyōchō”. The town too has not decided between them.

Iwatsutsukowake Jinja (石都々古和気神社) is an Engishiki-listed shrine of Ishikawa District, a line separate from the Tsutsukowake shrines of Shirakawa District. Ishikawa Town calls it the ichinomiya of Mutsu Province.

— Mutsu was a vast province, and this can be read as different shrines being treated as the ichinomiya in different areas, but no primary source saying so could be found (this site’s own reading).

Written from Japanese sources, each quoted. The Japanese page has the same discussion with the original wording.