His mother was Sahonookura mitome, a daughter of Kasugatatekuni katsutome (from the name ending with "tome," we can see this is a woman; however, father of Sahonookura mitome is unknown).
母は春日建国勝戸売（戸売とあることから女性であることが分かるが、父は明らかではない）の娘沙本之大闇見戸売（さほのおおくらみとめ）。