Home Naruto Jutsus Fugaku Uchiha Katon: Goukakyuu no Jutsu (Fire Release: Grand Fireball Technique)

Name: Katon: Gōkakyū no Jutsu, 火遁・豪火球の術, literally "Fire Release: Great Fireball Technique"; English TV "Fire Style: Fireball Jutsu"
Type: C-rank, Offensive, Close range (0-5m)
Users: Most Uchiha Clan Members, Yamashiro Aoba (anime only), ÅŒki (anime character only), etc.

Utilizing a high amount of chakra, a large ball of flame is exhaled from the user's mouth. When an Uchiha clan member perfectly masters this technique, the person is fully recognized as an adult.
This Katon jutsu is said to be the most powerful among all others of the same element, since this is seen as a rite of passage into adulthood for all Uchiha clan members.
This is considered by many fans to be Sasuke's signature technique. Hatake Kakashi remembered of the advancement of the Uchiha clan when he had seen that Sasuke had used it so perfectly as a newly graduated Genin, and at such a young age for that matter.