After defeating the Taira clan, Minamoto no Yoritomo establishes a military government (Kamakura Bakufu) with Kamakura (Kanagawa Prefecture) as its base in 1192. This becomes as powerful as the imperial court in Kyoto. However, after Yoritomo’s death, struggles for power between the subordinates who support the shogunate occur one after another, and the shogunate gradually loses its power. Around the same time the Imperial Court experiences issues regarding imperial succession, and Emperor Go-Daigo stands up with plans to regain the power of the Imperial Court by overthrowing the shogunate. In this war, the shogunate is defeated due to its predominant vassal, Ashikaga Takauji, disaffecting.