Fūinjutsu

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An example of a fūinjutsu.

An example of fūinjutsu in action.

Fūinjutsu (封印術, Literally meaning: Sealing Techniques) are a type of jutsu that seal objects, living beings, chakra, along with a wide variety of other things within another object. Fūinjutsu can also be used to restrict movement or unseal objects either from within something or someone.

The presence of a seal is marked by the appearance of formations of technique formulae, kanji, or else other kinds of symbols (likewise with Summoning Techniques).

A unison of barrier ninjutsu and fūinjutsu is referred to as a “Sealing Barrier” (封印結界, Fūin Kekkai).

In a similar fashion to genjutsu, fūinjutsu can be undone by combining specific seals with a Fūinjutsu: Release (封印術・解, Fūinjutsu: Kai, Literally meaning: Sealing Technique: Release) command.