An A-Class [Jutsu] used by the Uchiha clan in the hit anime/manga series, [Naruto]. Katon Goukakyuu no Jutsu (translated to Grand Fireball technique) was mastered at the age of 7 by the [Sharingan] user [Uchiha Sasuke]. Also, it's currently being used by the [Akatsuki] member, [Uchiha Itachi]