Izanami

Izanami is an ultimate dōjutsu of the Uchiha clan, in that it is capable of affecting an opponent, despite their ability to use their five senses. In exchange for the temporary ability that it grants the user, however, the Sharingan with which Izanami is cast becomes blind.

According to Itachi Uchiha, this technique is on par with the similarly-lethal Izanagi. Unlike the latter, which is a technique capable of altering destiny, Izanami is claimed as one that "decides" it.

Influence
Like the various techniques used with the Sharingan, this technique is named after a Shintō god. In this case, it is Izanami, who, together with her brother and husband Izanagi, created the islands and other deities of Japan.

One of the most famous stories about Izanami tells the tale of how Izanagi goes into Yomi, the Japanese underworld, to retrieve her after she died giving birth to the Shintō fire god Kagutsuchi. In Yomi, he manages to get Izanami to join him in his return (despite her reluctance, having already partaken of the food of the underworld). She relented, as long as he does not glance at her before they get out. Right before they reach the exit, however, Izanagi looks back and sees her in her ghoulish, rotting state. Frightened, Izanagi flees from Yomi and blocks the cave. Izanami curses Izanagi and breaks their tie, swearing that she will kill 1000 people per day. In response, Izanagi counters that 1500 people will be born each day.