Hikoyai

Hikoyai-no-Mikoto (日子八井命)[1][2] was a member of a Japanese imperial clan from the Kojiki and other sources.

After the death of Emperor Jimmu, Empress Himetataraisuzu-hime marries her stepson Tagishimimi, who would be considered a step-brother to Hikoyai-no-Mikoto and his brothers.

According to Kojiki, he was the son of Jimmu, the first emperor of Japan, and Himetataraisuzu-hime daughter of Omononushi no Mikoto.

[1] On the other hand, there is no mention of his name in the Nihon Shoki, and in the Shinsen Seijiroku, the Ukyo Emperor's separate Ibarada-ren article and the "Aso Family Brief Genealogical Record", there is a different theory that claims that he is the son of Kamiyai-mimi-no-mikoto.

[6] The "Shinsen Shōjiroku" commissioned by Emperor Saga and the "Aso family tree (阿蘇家略系譜, Aso-ka ryaku keifu)" list a different theory that Hikoyai was the son of Kamuyaimimi.