Emperor Yūryaku was the 21st Emperor of Japan, according to the traditional order of succession. According to the Kojiki, this Emperor is said to have ruled from the Thirteenth Day of the Eleventh Month of 456 (Heishin) until his death on the Seventh Day of the Eight Month of 479 (Kibi).

The Kojiki , also sometimes read as Furukotofumi or Furukotobumi, is an early Japanese chronicle of myths, legends, hymns, genealogies, oral traditions, and semi-historical accounts down to 641 concerning the origin of the Japanese archipelago, the kami (神), and the Japanese imperial line. It is claimed in its preface to have been composed by Ō no Yasumaro at the request of Empress Genmei in the early 8th century (711–712), and thus is usually considered to be the oldest extant literary work in Japan.