Ninja in Naruto use a variety of impressive techniques to defeat their enemies. They're especially proficient in ninjutsu, genjutsu, senjutsu, and taijutsu. Taijutsu is often overlooked, but it's actually pretty formidable.
Essentially hand-to-hand combat, this fighting style closely resembles something human beings in the real world could potentially use. Yes, it's often combined with impossible techniques – you will never see anyone in an actual martial arts tournament rapidly grow their bones and use them as spears – but most taijutsu techniques are based in reality.
Anime fans may never be able to use the Sharingan, but they sure can judge the best taijutsu users Naruto has to offer.
Might Guy is one of the taijutsu titans. Consequently, he's able to teach his student Rock Lee to be a formidable ninja without using any other kind of jutsu.
Though Guy can use chakra, he primarily studies genjutsu and taijutsu. This dedication allows him to go toe-to-toe with Madara, a ninja impervious to everything except taijutsu and senjutsu.
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Kimimaro's primary technique, Shikotsumyaku, allows him to manipulate his bones at will, turning them into powerful weapons. However, this ability would likely be completely useless if Kimimaro didn't know taijutsu.
Turning your ribcage into a series of knives is impressive, but having the physical strength and stamina to wield them is what really counts in battle.
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Rock Lee can't use chakra, so he's limited to a few techniques. However, with the help of his teacher, Might Guy, Lee masters taijutsu. By age 13, he is able to pass through five of the Eight Gates and clear all of them four short years later.
Accordingly, Lee can overcome his body's limitations and master the Crane Wing Formation, which helps him demolish half a meteorite.
When he drinks alcohol, Lee wields taijutsu even more formidably. His mental limits disappear, and he becomes an unstoppable punching force.
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Neji's byakugan allows him to see people's chakra pathways, which he can attack and manipulate with the Gentle Fist technique. Neji is initially forbidden from learning this signature Hyûga technique, but he teaches himself Gentle Fist anyway. The style involves almost unperceptively quick movements that are impossible to perform without great strength and dexterity.
After he trains under Might Guy, Neji greatly improves his taijutsu skills, allowing him to fully utilize his family's style.