In addition, when the Imperial Prince Morihito (later, the Emperor Nijo), who was born from Tsunemune's elder sister, Yoshiko (MINAMOTO no Arihito's adopted daughter) was formally installed as Crown Prince, he was appointed to Togu Gon no Daibu (Provisional Master of the Crown Prince's Quarters) and his political position was heightened as a maternal relative.
さらに姉の懿子（源有仁養女）が産んだ守仁親王（後の二条天皇）の立太子で春宮権大夫に任じられ、外戚として政治的地位を上昇させる。