Takashina no Takako (高階貴子, sometimes read Takashina no Kishi; died 996), also known as the mother of the Honorary Grand Minister (儀同三司母, Gidōsanshi no haha) or as Kō no Naishi (高内侍), was a Japanese waka poet of the mid-Heian period. One of her poems was included in the Ogura Hyakunin Isshu.