Despite leading the winning forces in the Hogen Disturbance, this family's downfall was sealed by such military defeats as Ichinotani and Yashima Island, as well as a battle in which a notable sword was lost and Prince Antoku drowned.
One member of this family took the title of "shinno," or "new emperor," and attempted to establish a secessionist government at Kanto. Another member of this family destroyed the pirates on the Inland Sea; that one's father allied with Shirakawa to implement the insei system. This group controlled Japan during the so-called Rokuhara regime, having achieved complete power by allying with Go-Shirakawa against Sutoku, and then consolidated their victory in the Heiji War. Despite leading the winning forces in the Hogen Disturbance, this family's downfall was sealed by such military defeats as Ichinotani and Yashima Island, as well as a battle in which a notable sword was lost and Prince Antoku drowned. For 10 points, name this clan which met its end in the 1185 naval battle of Dan-no-ura, leaving Japan to the Minamoto family and Kamakura shogunate.
One member of this family took the title of "shinno," or "new emperor," and attempted to establish a secessionist government at Kanto.
Taira [or Heike]