chakra is very important in Naruto. coz it make realize the jutsu especially for Ninjutsu technique.
Chakra
Simplified diagram of Chakra generation mechanics.Body Energy (Shintai Enerugī) is a vital force generated within the cells of living organisms. Combined with Spiritual Energy (Seishin Enerugī?), or force of will and mental fortitude, it can be harnessed to a variety of uses, such as the production of the superhuman stamina used in taijutsu. It can also be used for formation of the energy known as chakra (chakura), essential to the use of even the most basic of jutsu.
Once created, chakra moves about the body to any of its release (Chakra) points, utilizing a network of passages not unlike the circulatory system. By various means -- handseals being the most common -- it can then be manipulated to the end materializing effects otherwise impossible under the laws of nature, such as walking on water or breathing fire. In the context of oriental martial arts philosophy, chakra is indistinguishable from Qi (Chi).
Depending on the ratio in which physical and spiritual energy is mixed, different types of chakra can be formed. Elemental chakra is the most common product of this, and is used to perform elemental jutsu. The five known elemental natures are earth, fire, lightning, water, and wind. Most ninja have a natural affinity to one type of chakra, but have the capacity to create elemental chakra apart from their own affinity. Each element is both stronger and weaker against another. The order is fire, wind, lightning, earth, and water, with each being weaker than the previous and stronger than the next. Water loops back into fire. For example, a lightning based attack would be very effective against an earth based defense, but easily countered by a wind user. Additionally, elemental techniques can be countered by techniques of the same element, provided the technique being countered is of equal or lesser power. A sixth elemental chakra has been mentioned but yet not identified, so its nature and weaknesses in relation to the others are unknown.
Certain kekkei genkai can also create unique elements, such as wood (earth + water) and ice (water + wind), through a mixture of the basic elements, which normal ninja are incapable of doing. While some ninja are capable of producing varied types of chakra, they can't do so simultaneously. Yamato also mentions light and dark chakra, but doesn't elaborate on what they're used for.
The Elements kind of Chakra:
-Fire: Katon
-Water: Suiton
-Wind: Fuuton
-Earth: Daton
-Lightning: Raiton
Eight Gates
A diagram showing the location of each gateThe Eight Gates (Hachimon, English TV "The Eight Inner Gates") are eight specific points on a person's chakra circulatory system. They limit the overall flow of chakra within a person's body. The basis for the idea of the chakra gates comes from the body's limits on the functions within it. This makes the body much weaker, but it keeps the body from expiring too soon. By opening these gates, the user can surpass their own physical limits at the cost of extreme damage to their own bodies. Opening the final gate will grant the user enough strength to surpass a Kage; however, the result of opening the final gate is that all the energy from the openers cells is used up, resulting in the user's death. The state where all eight gates are opened is called Hachimon Tonkō no Jin (Hachimon Tonkō no Jin). Rock Lee is able to open the first five gates. Might Guy, who taught Lee the skill, is able to open at least six. Kakashi Hatake can open at least one gate, as shown while he is rock climbing where a shot of his brain shows the relevant point activating.
