(According to "Nihon Sandai Jitsuroku" (lit. the True History of Three Reigns of Japan), Yoshio was born in Kyoto in 805 when his father Kunimichi had already been pardoned and returned to Kyoto, but another story in the "Tale of Ujishui" says that Yoshio was originally a servant of gunji (the local administrative official) of Sado and was later adopted by the Otomo clan.)
（『日本三代実録』によると國道は805年に恩赦されて京に帰っており京で出生したという説、また善男は元来は佐渡の郡司の従者で後に大伴氏の養子になったという説（『宇治拾遺物語』など）がある）