The family whose original forefather is Ujinobu SASAKI who was the forth son and inherited six counties of Takashima, Ika, Azai, Sakata, Inugami and Aichi in Gohoku, north of lake, and Takatsuji KYOGOKU's mansion in Kyoto was later called the Kyogoku clan.
このうち江北にある高島、伊香、浅井、坂田、犬上、愛智の六郡と京都の京極高辻の館を継いだ四男の佐々木氏信を祖とする一族が、後に京極氏と呼ばれる様になる。