Oda Nobunaga, one of the "Three unifiers of Japan," overthrew the Ashikaga Shogunate, which had nominally ruled Japan for more than 200 years, and brought an end to a period of turmoil that had lasted for more than a century since the Upheaval of Onin. He was betrayed and killed by his vassal Akechi Mitsuhide, but his political legacy was inherited by Toyotomi Hideyoshi. He is one of Japan's most famous warlords and tragic heroes.