Ōmiyahime was a woman who lived during the Sengoku period. She was the daughter of Ōuchi Yoshioki, the fifteenth head of the Ōuchi clan and a sengoku daimyō based in Suō Province. She became the formal wife of Yoshimi Takayori, a retainer of the Ōuchi. After visiting an ancestral shrine, on 10/16 of Tenbun 9 (1540), Takaoyori was murdered by bandits in Yamaguchi at the age of forty-one. The headship of the clan was inherited by his younger brother, Yoshimi Masayori, following his return to secular life from life as a monk. Ōmiyahime then remarried and became the formal wife of Masayori. She bore a son named Yoshimi Hiroyori.
Ōmiyahime died on 5/12 of Tenshō 5 (1577) and was buried below Tsuwano Castle.