Kyōtoku incident

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The Kyōtoku incident was a long series of battles in the Kantō region of Japan from 1454 to 1482, during the late Muromachi period. It began when Ashikaga Shigeuji, the Kantō kubō (the shogun’s deputy in the region), ordered the murder of his deputy Uesugi Noritada in 1454. The Uesugi, the Imagawa, and other clans fought to control Shigeuji. Imagawa Noritada captured and burned Kamakura, the Kantō’s main center, and Shigeuji fled to Koga, becoming known as the Koga kubō. In 1459, the shogun sent his brother Ashikaga Masatomo to take the kubō post, but Shigeuji’s supporters refused to accept him, and fighting continued. The Uesugi family split into three branches—the Yamanouchi, Ōgigayatsu, and Inukake—based on where they lived. After the Ōnin War in 1467, the shogunate’s power faded and Japan entered the Sengoku period of civil war. The Kantō fighting paused for about ten years before resuming in 1477 and lasting until 1482, when peace was negotiated.