Emperor Ichijō
, the second son of Michitaka, was a "kugyo" (Japanese noble) of the Heian period. His mother was Takashina no Takako, also known as Kō-no-Naishi (高内侍). His sister Teishi (Sadako) was married to Emperor Ichijō, and Korechika aspired to become the regent ("Sessho") for his young brother-in-law after his father's death. Korechika's (ultimately fruitless) ambitions pitted him against his powerful uncle, Fujiwara no Michinaga, and the resulting power struggle continued until Empress Teishi's unexpected death. This left Michinaga's daughter, Shoshi, as Ichijō's sole empress, solidifying Michinaga's power at court.