He worked as a devoted assistant of Naka-no-Oe-no-Oji, later Emperor Tenchi, since the Taika Reforms and laid the foundation for the prosperity of the Fujiwara clan.
大化の改新以降に中大兄皇子（天智天皇）の腹心として活躍し、藤原氏繁栄の礎を築いた。