According to "Kojiki" (The Records of Ancient Matters) and the sixth alternate writing of "Nihonshoki," Sukunabikona, who built up a country along with Okuninushi no mikoto (chief god of Izumo in southern Honshu Island, Japan, and the central character in the important cycle of myths set in that region), went to tokoyo, which was across the seas, after he finished creating the country.
『古事記』や『日本書紀』1書第6によると、大国主命とともに国造りを行ったスクナビコナは国造りを終えた後に海の彼方にある常世の国に行ったという記述がある。