Empress Genmei (r. 707-721) charged Yasumaro with the duty of writing the Kojiki in 711 using the differing clan chronicles and native myths.

At the end of the Yuan-ing Dynasty, in 715, Yasumaro was promoted to Jushiinoge (Junior Fourth Rank, Lower Grade).

It is located on the southern slope of a hill that stretches from east-to-west, near the northwestern end of the Yamato Plateau, which runs east of the Nara Basin.

A wooden coffin covered in charcoal was buried with its long axis running north-south in the north-north center of the burial pit, and judging from the hollow area remaining in the charcoal layer, the size of the coffin is estimated to be approximately 66-cm long, 3-cm wide, and 38-cm high.

Yasumaro appears in the video game Toukiden: The Age of Demons as a mitama (a soul of a hero from Japanese history).