Fire Release

The are offensive-type techniques that allow the user to to manipulate their fire chakra-nature to create fire by super heating their chakra and releasing it from their mouths. Fire Ninjutsu is common among Konohagakure ninja, with the Uchiha Clan being particularly proficient with its use. Fire Release ninjutsu is commonly affiliated with the Tiger hand seal.

A Fire Ninjutsu is strong against a Wind Ninjutsu; because wind-natured chakra will naturally feed into a Fire Release Ninjutsu, wind and fire ninjutsu can be used in a synchronized collaberation jutsu to create a jutsu stronger than the two individual jutsu. Fire jutsu will naturally be overcome by a Water Ninjutsu, though a sufficiently powerful fire-based attack can still overpower a water jutsu, causing it to evaporate.

Fire is defined as 'the oxidation of a combustible material, it is an event that results when a flammable and/or a combustible material with an adequate supply of oxygen or another oxidizer is subjected to enough heat and is able to sustain a chain reaction'. A fire ninjutsu's strength can be affected by the presence or absense of these three certain factors. There are three ways that a Fire Release can be made stronger:
 * More Fire-natured chakra (more Heat): seen during the 'Invasion of Konoha' arc in the Third Hokage's struggle against Orochimaru he used Fire Release: Fire Dragon Flame Missile and by adding more fire-natured chakra for heat, it made the jutsu so intense the flames became white hot.
 * Addition of certain earth or water-natured chakra/jutsu (more Fuel): whenever intoduced to accelerants such as:
 * Toad Oil and Black Oil, (allowing flames to spread anywhere)
 * Combustible fuels and materials encompassing certin types of rock or earth, (probably may also include wood,) known for their reactions to heat, similar to Black Powder, and any other materials with a pyrotechnic composition, (that will explode on contact with the target)
 * Addition of Wind-natured chakra (more Oxygen): mentioned above, whenever a Fire Release ninjutsu and a Wind Release Ninjutsu of the same rank clash, the fire ninjutsu will naturally take in the wind-natured chakra, becoming a flame of greater intensity. This is because the wind chakra will provide the fire chakra with more oxygen.  As an oxidant, the increased supply of oxygen will accelerate the process of combustion, increasing the strength and rank of the fire jutsu.

As demonstrated by the fight between Hiruzen Sarutobi and Orochimaru in the Invasion of Konoha arc, Fire Release also has a good affinity with Earth Release and so can be used together in a collaberation jutsu. When used together, the Fire ninjutsu (Fire Release: Fire Dragon Missile) needs to be implemented with the right timing in order to be combined with the Earth ninjutsu (Earth Release: Earth Dragon Bullet), the Fire chakra being provided with more combustive physical force by the accelerant from the Earth ninjutsu.

Furthermore, in the case of Elementally-recomposed Nature Transformations, rarely found outside of a kekkei genkai, Fire-natured chakra can be blended with Earth-natured chakra; the fire chakra superheats the molecular structure of the earth (that the earth chakra provides and controls) and induces it to melt into molten liquid rock, creating Lava Release Ninjutsu.