According to the anecdote of the origin of the name of the place called Mori-go, Ou-gun (currently Yasugi City, Shimane Prefecture), in "Izumo no Kuni Fudoki," Onamochi no Mikoto (Okuninushi) vanquished 'Yamata no Orochi' (big snake with eight heads) and on the way home declared transfer of the land.
『出雲国風土記』の意宇郡母里郷(現；島根県安来市)の地名起源説話には「八岐大蛇」を大穴持（大国主）命が退治し、その帰りに国譲りの宣言をしたとある。