A son of Emperor Go-Daigo. He entered Mount Hiei as a child and became Tendai Zasu, but renounced his vows to join his father's anti-shogunate campaign. Known as Oto no Miya, he waged guerrilla warfare from the mountains of Yoshino and Kumano. Together with Kusunoki Masashige and others, he harassed shogunate forces and contributed greatly to the fall of Kamakura. Under the Kenmu Restoration, he was appointed Sei-i Taishogun, but his conflict with Ashikaga Takauji deepened. Alienated even by his father, he was stripped of the title, imprisoned in Kamakura on Takauji's accusations, and killed on Ashikaga Tadayoshi's orders during the Nakasendai Rebellion in 1335, at just 28. In the Meiji era, Kamakura-gu shrine was built to enshrine him.