Four Symbols Seal

This technique requires a great deal of talent to perform. The user applies the seal's formula to an object or a human's body, sealing a large enemy or an evil spirit within them. If two Four Symbols Seal are used, a stronger seal is created; this is called the Eight Trigrams Sealing Style. If the Four Symbols Seals do not completely overlap with each other, this allows the enemy/spirit's chakra to merge with whoever they've been sealed into. This is how the Nine-Tails was sealed into the body of Naruto Uzumaki.Rin no Sho, page 216
The Four Symbols Seal is based on the fūinjutsu of Uzushiogakure's Uzumaki clan.Naruto chapter 500, page 3 According to Killer B, it is stronger than the Iron Armour Seal used to seal the Eight-Tails within him.Naruto chapter 496, page 7 The Four Symbols Seal is also left on the stomachs of those who perform the Dead Demon Consuming Seal.Naruto chapter 123, page 13Naruto chapter 504, page 6
== Trivia ==
* This technique has the opposite effect of the Reverse Four Symbols Sealing.
* In the manga, after transferring Kurama's Yin-half into an incapacitated Naruto Uzumaki, Obito Uchiha was also shown reestablishing the former's two Four Symbols Seals.Naruto chapter 666, page 16
* In the anime, Orochimaru suited Mecha-Naruto with two Four Symbols Seals in order to take the Nine-Tails from Naruto.Naruto: Shippūden episode 376
== References ==
 
de:Shishou Fuuin
fr:Sceau des Quatre Symboles
id:Segel 4 Simbol
pl:Shishō Fūin
pt-br:Selo de Quatro Símbolos