His family line goes back to Imperial Prince Katsurabara, and his ancestor Gyobu no taifu IDA was, in fact, the lord of Sakata Castle in Musha County of Kazusa Province.
蓋君の家系を聞くに遠く葛原親王に出て､而して乃祖井田刑部大輔は實に上總國武射郡坂田の城主なりき。