 In 995 Michinaga's two brothers Fujiwara no Michitaka and Fujiwara no Michikane died in rapid succession, leaving the regency vacant; Michinaga won a power struggle against his nephew Fujiwara no Korechika, brother to Emperor Ichijō's wife Teishi, aided by his sister Senshi (mother to Emperor Ichijō, Emperor En'yū's wife).Because Teishi supported Korechika—later discredited and banished from court—her base of power disintegrated.Four years later Michinaga sent Shōshi, his eldest daughter, to Emperor Ichijō's harem when she was about 12.