Four Symbols Seal

This is a sealing technique based on the the fūinjutsu of Uzushiogakure. The sealing formula is carved into, a human body or an object, and is mainly used when a giant enemy or evil spirit needs to be sealed. To use it, it is necessary for the user to have great ability. This is a high-quality seal and is more durable compared to the Iron Armor Seal that holds the Eight-Tailed Giant Ox. This seal is the opposite of the Reverse Four Symbols Sealing Technique.

When two Four Symbols Seals are used together, they form the Eight Trigrams Sealing Style. When the Fourth Hokage sealed the Nine-tails into Naruto, he left an opening at the space where the two four symbols seals meet, allowing the Demon Fox's chakra to merge with Naruto's chakra. The Fouth left behind a key with Gerotora, which would be used to tighten the seal when it weakened. Naruto would eventually use the key to gain control over the nine-tails chakra.

The seal also usually appears at the stomach of the users of the Dead Demon Consuming Seal after their target (and the user's own soul) is sealed at the Death God's stomach, such as what happened to Hiruzen Sarutobi after sealing Orochimaru's arms.