Oda Nobunaga, known as Dai Rokuten Maou, wants to take over the world. With the help of his Juunishinshou, he was working to achieve that goal, but he was killed by child Kyo at Honnoji Temple, years before the Battle of Seikigahara. Since he was important to the Mibu's plans, the Mibu Clan resurrected him in Lord Torii's (Benitora's uncle) body. Lord Torii's body was given to the Mibu by Kyoshiro who then implanted Oda Nobunaga's soul into the body. Kyo defeated Nobunaga at the Battle of Seikigahara. Nobunaga was again resurrected and later encountered Kyo in Aokigahara Forest. Kyo and Oda Nobunaga fought after Benitora knocked him off of his horse. The fight resulted in the death of Oda Nobunaga, in the anime. In the manga, Yukimura requests that Kyo let the wounded Oda Nobunaga go. Kyo kills him in their next battle. Shindara takes Nobunaga's head to the Mibu, who then resurrect him, this time in Shiina Nozomu's body, so Nozomu's memories can be accessed by Nobunaga who will also be able to use Nozumi's powers. Nobunaga fights Kyo for the fourth time; during which Oda revives the members of the Juunishinshou defeated so far, using Nozumi's shaman powers. He is once again defeated, only to reveal that he was just like the rest of the group (via Sasuke's remark); a man looking to be the strongest, to have no fear, and create his own path in the world. A world supposedly of 'peace' (a world under his control). The manga leans towards explaining Nobunaga's attraction to Kyo (his fearless eyes) and how Kyo seemed to be the reason Nobunaga felt moved by humanity, and strived to be the strongest. He tells Kyo that he will return again, because that has been him will all along, to defeat Kyo. Kyo accepts this challenge.
The encounter with Shiina Nozomu and the background story of Nobunaga does not occur in the anime. Instead, Nobunaga's sister takes the place of Nozomu, as Shatora, the leader of the Jūnishinshō. She resurrects her brother from Lord Torii to a tree then into Kyo's body. Nobunaga has a simple character role of someone who has gone insane and only wants to take over the world.