The sister of Kishi was the wife of MINAMOTO no Toshifusa, who supported Imperial Prince Sukehito but was overthrown after being suspected of planning treason against Emperor Toba in the Senjumaru Incident (an assassin who failed in an assassination attempt) in 1113, and Imperial Prince Sanehito was led to house confinement and passed away in 1119 from despair before his mother Kishi.
また基子の姉妹は輔仁親王を支持する源俊房の妻であったが、俊房は永久(元号)元年（1113年）千手丸事件で鳥羽天皇に対する謀反の嫌疑により失脚、輔仁親王も閉門に追いやられ、失意のうちに元永2年（1119年）母基子に先立って没した。