One member of this family
One member of this family killed his uncle Kunika, but was himself killed by Sadamori and Masakado at the battle of Kojima. The Sanjusangendo temple was built by one member of thisfamily, and that man helped this family rise to prominence by defeating pirates on the Inland Sea. This clan allied against Sutoku and helped Go-Shirakawa come to power and end the Hogen rebellion, and it later came back strongly to win the Heiji war. In another battle, this family's general Taguchi revealed the location of the ship containing the six-year-old emperor Antoku and the widow of its leader Kiyomori. In that battle fought in the Shimonoseki Straits, this family suffered a loss to the forces of Minamoto no Yoritomo. For 10 points, identify this clan which was was succeeded by the Kamakura shogunate after the battle of Dan-no-ura.
One member of this family killed his uncle Kunika, but was himself killed by Sadamori and Masakado at the battle of Kojima.
{Taira} (or {Heike} )