Said to be of the Toki clan lineage of Mino Province, though much of his early life remains obscure. After serving Ashikaga Yoshiaki he was taken up by Oda Nobunaga and rose rapidly. He participated in major Nobunaga campaigns including the burning of Mt. Hiei in 1571 and the Battle of Nagashino in 1575, and earned high praise for pacifying Tanba Province in 1579 in preparation for the assault on the Mori clan. By 1582 he had become one of Nobunaga's most trusted lieutenants as the lord faced imminent western campaigns. Yet on 2 June 1582, ordered to march to the western front, Mitsuhide abruptly turned against his master and stormed Honnoji temple in Kyoto, where Nobunaga was lodging. Surrounded, Nobunaga died by his own hand, and the dream of national unification vanished. Mitsuhide moved swiftly to seize Kyoto and Osaka, but a mere thirteen days later he was defeated at the Battle of Yamazaki by Hashiba Hideyoshi, who had raced back from the siege of the Mori. While fleeing, Mitsuhide was caught by peasant hunters and killed in a bamboo grove at Ogurusu at around age 55. The true motive for his rebellion remains disputed and mysterious to this day.