Hand Seal

are used to perform many ninjutsu, genjutsu, and other secret arts other than taijutsu. The exact amount of chakra neccesary to perform a jutsu is manipulated through hand seals. There are different sequences of hand seals for every technique, requiring memorization.

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 42 hand seals to activate. Tobirama Senju, the Second Hokage, however, just needed to use one hand seal to complete the technique, a testament to his skill.

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

Basic Seals
There are twelve basic seals, each one named after an animal of the Chinese zodiac.
 * This hand seal is commonly affiliated with Water Release.
 * This hand seal is commonly affiliated with Fire Release.
 * This hand seal is commonly affiliated with Earth Release. It is also affiliated with Wood Release.
 * This hand seal is commonly affiliated with Lightning Release.
 * This hand seal is commonly affiliated with the anime-only Crystal Release. This hand seal is also commonly affiliated with the focusing of chakra.
 * This hand seal is commonly affiliated with Fire Release.
 * This hand seal is commonly affiliated with Earth Release. It is also affiliated with Wood Release.
 * This hand seal is commonly affiliated with Lightning Release.
 * This hand seal is commonly affiliated with the anime-only Crystal Release. This hand seal is also commonly affiliated with the focusing of chakra.
 * This hand seal is commonly affiliated with Lightning Release.
 * This hand seal is commonly affiliated with the anime-only Crystal Release. This hand seal is also commonly affiliated with the focusing of chakra.
 * This hand seal is commonly affiliated with the anime-only Crystal Release. This hand seal is also commonly affiliated with the focusing of chakra.

Other Hand seals
Besides the twelve basic hand seals, there are unique hand seals used for certain techniques. These hand seals are rarely seen, and can be considered unique to specific jutsu.

Examples are the seals used for Haku's Demonic Ice Crystal Mirrors, the seal used for the Yamanaka clan's Mind Body Switch Technique, and the seal Naruto Uzumaki used to activate the Shadow Clone Technique.