Shinkai: Lobotomy Technique

Developed by Nui Niyari in order to assist Kamaitachi Tetsugaku in controlling his psychopathic urges, this technique is used on one to put them into a partial trance-like state, where their more opulent emotions are suppressed or reduced. This is done by placing a seal on their forehead that resembles the kanji for control (詞), which affects the subject on a subconscious level. An example of it's purpose would be a use on aviolent individual, such as a criminal shinobi, in order to make them virtually harmless and ready for capture. If not renewed every 24 hours, the seal wears off.

Trivia

 * The term "Lobotomy" refers to a neurosurgical procedure ushered in during the 1930's, which was uncommonly prescribed for certain psychiatric conditions.