Izanagi

Izanagi is a Sharingan dōjutsu which the Uchiha clan deemed forbidden. According to Madara Uchiha, it is the most powerful genjutsu an individual can cast on themselves. When used, the caster removes the boundaries between reality and illusion, allowing the user to reinforce their vision of reality on themselves. The actual effects of Izanagi varies from user to user, but seem to involve the ability to deem any negative events an illusion and positive events reality. Though the sustained time of the jutsu can greatly differ between individuals, Danzō is implied to have had Orochimaru forcibly extend it to as long as 60 seconds. After the aforementioned time, the eye casting Izanagi will close and be stricken with blindness. It is this side effect of Izanagi that caused the Uchiha to label the technique a kinjutsu.

Danzō, in an effort to make practical use of the jutsu, had ten Sharingan eyes implanted into his right arm. He has been seen using these eyes to make any injury to himself, even fatal ones, a mere illusion while his own attacks become reality. Since the effects of Izanagi vary, Madara suspects that the eyes are the result of one of Orochimaru's experiments to extend their use. This allows Danzō to survive fatal injuries many times over. However, not being of Uchiha blood, this technique requires massive amounts of chakra for Danzō to use.

Influence
Like the various jutsu gained from the Mangekyō Sharingan, this jutsu is named after a Shinto kami. In this case it is Izanagi-no-Mikoto, who, together with his sister and wife Izanami-no-Mikoto, created the islands and other deities of Japan.

One of the most famous stories about Izanagi-no-Mikoto tells the tale of how he goes into Yomi, the Japanese underworld, to retrieve Izanami-no-Mikoto after she died giving birth to the Shinto fire god Kagutsuchi-no-Kami. After he fails to retrieve her and leaves Yomi again, he washes himself in a stream. As he cleans his left eye, Amaterasu-Ōmikami is born, as he cleans his right eye, Tsukuyomi-no-Mikoto is born, and as he cleans his nose, Susanoo-no-Mikoto is born.