Iaidō

The term Iaidō (居合道) refers to a specific style of kenjutsu that is concerned with the smooth, controlled movements of drawing the sword from its scabbard, striking or cutting an opponent, removing blood from the blade, and then replacing the sword in the scabbard.

The speed at which these techniques can be executed — the initial strike in particular — is such, that when performed by a skilled user, it can prevent enemy shinobi from forming hand seals (and thus ninjutsu), by exploiting the small opening that these movements create. This makes them highly effective against most shinobi and potentially, those of even Hanzō's calibre, if performed by one who has mastered the style, such as Mifune.

Combined with the god-like speed of a practitioner like Seireitou Hyūga, the Iaidō techniques appear to be capable of cutting through steel.

Sayotsu Uzumaki with his incredible speed and natural talent for Kenjutsu has taken Iaidō techniques to such tremendous levels that no other shinobi can reach.

Kiritsu Taisei's elegant movements provide a fresh look for the style, and thanks to the lightness of his sword, he is capable of releasing an unpredictable barrage of slashes and cuts from his sword before the blade rests back in its scabbard.

Since Koji Naito's sword Yuushu, has a long piece of cloth for a scabbard, it unravels at high enough speeds for the cloth itself to draw blood if in contact with flesh.

With the use of her Wind Release Chakra Mode, Fukkatsu can launch instantaneous slashes faster than the speed of light, killing her foes in the blink of an eye.

Gekihen's natural skill and eventual mastery of Kenjutsu allows him to incorporate it with his samurai sabre, dealing powerful slashes that can cut multy-story-sized beasts within moments.