Summoning Technique

Before an animal summoning can be performed, a prospective summoner must first sign a contract with a given species. The contract can come in the form of a scroll or a tattoo, which is signed in the contractors own blood. After this, they need only perform the hand seals, offer an additional donation of blood, and use the same hand they signed the contract with to summon the creature. The amount of chakra used during the summoning determines how big the summoned creature can be. It should be noted that anyone can summon the animal as long as they have the blood from someone who has made a contract, along with sufficient chakra of their own. If a user attempts to summon an animal without first signing a contract, the user will be teleported to the home of the animal they have a natural affinity for.

While most summoners have only been shown capable of summoning one type of creature, Pain (through the Animal Path) has been seen summoning several different animals and even people. Pain does not provide a blood offering when performing a summon. Sasuke Uchiha has summoned snakes and hawks at different points, but unlike Pain he can apparently only summon one species at a time.

Summoning can serve as a base for other jutsu, as is the case with Summoning: Food Cart Destroyer Technique and Summoning: Quick Beheading Dance. In these cases, summonings may not be restricted to creatures. Some items are not summoned from anywhere, instead only being released from storage, no blood is needed and thus it is not a conventional summoning.

Under the right circumstances, it is possible to summon a tailed beast if it is under one's control, usually through the Sharingan (as in the case of Madara Uchiha being able to control and summon the Nine-Tailed Demon Fox).