His ancestor was King Tomaki, a descendant of Emperor Koken in the Later Han Dynasty, who came from abroad to Japan during the period of Emperor Ojin.
先祖は後漢の孝献帝（こうけんてい）に連なる登萬貴王（とまきおう）で、応神天皇の時代に日本に渡来したといわれている。