Name: Tsukuyomi, 月読, literally "Moon Reader"
Type: Kekkei Genkai, No rank, Supplementary, Short range (0-5m)
Users: Uchiha Itachi
Named after the Shinto god of the moon, this Genjutsu is one of the most powerful Uchiha jutsu enabled by the Mangekyō Sharingan. The Mangekyō user places the victim in an illusory world where all aspects, including the perception of time, are controlled by the user.
Uchiha Itachi uses this ability to inflict several days' worth of torment on his victims in an instant, which tends to leave the victim bedridden. However, Tsukuyomi is an enormous drain on the user, which discourages its frequent use.