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-Hand Seals

Seals (in; English TV "Hand signs") are used to perform many ninjutsu, genjutsu, and other secret arts other than taijutsu. The exact amount of chakra necessary to perform a technique is manipulated through hand seals. There are different sequences of hand seals for every technique, requiring memorisation.

While techniques may require a number of hand seals to work, a skilled ninja can use less or even one to perform the same technique. An example of this is the Water Release: Water Dragon Bullet Technique, which requires a total of 44 hand seals to activate. Tobirama Senju, the Second Hokage, only needed to use one hand seal to complete the technique, a testament to his skill. In fact, by Part II, Sasuke Uchiha has managed to master the Chidori to the point of not needing a single hand seal to invoke it.

Although rare, it is possible for a shinobi to be able to do hand seals with just one hand. The only shinobi seen so far capable of this are Haku and Guren.

Basic Hand Seals

There are twelve basic seals, each one named after an animal of the Chinese zodiac.

Bird (Tori)
Boar (I)
Dog (Inu): This hand seal is commonly affiliated with the movie only Ice Release and with Danzō's Wind Release.
Dragon (Tatsu)
Ox (Ushi)
Tiger (Tora): This hand seal is commonly affiliated with Fire Release.
Snake (Mi): This hand seal is commonly affiliated with Earth Release and with Wood Release.
Rat (Ne): This hand seal is commonly affiliated with the special Shadow Techniques of the Nara clan.
Horse (Uma)
Monkey (Saru)
Hare (U)
Ram (Hitsuji)

Other Hand Seals

Clone Seal

This seal is most commonly associated with the creation of clones using techniques such as the Shadow Clone Technique, its derivative and the Multiple Wood Release Clones Technique, separate from the basic twelve seals, where index and middle fingers from both hands are crossed. This hand seal is also used in performing the Water Release: Water Shark Bullet Technique.