Japan's oldest chronicle, Kojiki or "Record of Ancient Matters" was compiled in 712. It begins with the creation myth and the emergence of gods. 4 episode where are located at Hyuga, "The Cleansing""Sun Goddess Amaterasu""Blooming Flowers" and "Umisachi and Yamasachi" were made into animation.

(Source: http://www.yamamura-animation.jp/)