A technique where chakra kneaded inside the body is converted into fire and expelled from the mouth either as a massive orb of roaring flame or as a continuous flame-thrower. The scope of the attack is altered by controlling the volume of chakra that is mustered. The released flames will engulf their target, and leave a crater on the ground's surface. This technique apparently requires more than average chakra reserves and most genin should not be able to do this technique.
In Naruto Shippūden: Ultimate Ninja 4, after learning all other techniques and beating Kakashi in battle, he will teach the player this technique and allows the player to customise it to characters in free battle.