Third son of Emperor Go-Shirakawa. Brilliant and gifted in poetry, he was a strong candidate for the throne but was blocked by Taira no Kiyomori's political interference. In April 1180, unable to endure Taira tyranny, he issued a decree (ryōji) with Minamoto no Yorimasa calling on all Minamoto warriors to overthrow the Taira. This decree triggered uprisings by Yoritomo, Yoshinaka, and others, igniting the Genpei War. However, Mochihito himself was killed on May 26, struck by a stray arrow near Kōmyōsanji while fleeing toward Nara after a battle near Byōdō-in in Uji. He was 30. Though his uprising lasted barely a month, his decree fundamentally changed the course of Japanese history.