Four Symbols Seal (Kaitan)

The Four Symbols Seal is an integral part of Uzumaki fūinjutsu. It can be used for many different purposes, up to the point of sealing tailed beasts. Its other uses include sealing away chakra, people or objects, or even souls. It requires a great deal of fūinjutsu skill and is mainly used to seal large amounts of chakra or giant enemies. It is also referenced that it could be 'encoded' to a certain person's chakra, so it will only open for them.

Anjin's Mentor discovered a way to downsize the seal, decreasing preparation time and allowing it to be used for more mundane purposes. It is also referenced that it could be 'encoded' to a certain person's chakra, so it will only open for them. Anjin Uzumaki found a way to seal a measure of lightning chakra in a seal and remotely release it as an attack.