Ugayafukiaezu no Mikoto is a deity in Japanese mythology, born on the shore where his mother Toyotama-hime gave birth in the form of a great sea creature, and his name refers to the unfinished thatched roof of the birthing hut. He is recorded in the Kojiki and Nihon Shoki as the father of Emperor Jimmu, Japan's legendary first emperor, linking him to the imperial lineage descended from the sun goddess Amaterasu. Some shrines associate him with safe childbirth and general well-being, though such benefits are traditional devotional beliefs rather than established doctrine.