Kojiki 125

Section CXXV. Emperor Nin-toku (Part VII.—He Loves Yata-no-waki-iratsume)

The Heavenly Sovereign, loving Yata-no-waki-iratsume, deigned to send her an august Song. That Song said: “Will the one sedge-stem of Yata, having no children, wither as it stands? Poor sedge-moor! Sedge-moor indeed is what I may say—poor pure girl!”

Then Yata-no-waki-iratsume replied in a Song, saying:

“Even though the one sedge-stem of Yata be alone, if the Great Lord say it is right, even though it be alone [it is right].”

So the Yata Tribe was established as the august proxy of Yata-no-waki-iratsume.