Nintaijutsu

Nintaijutsu is a fighting style which is a combination of ninjutsu and taijutsu. It is a style of fighting that Kumogakure ninja specialize in, the most notable being the Fourth Raikage, A.

One of two ways to use nintaijutsu is for the user enhances his body with a ninjutsu, like the Raikage's Lightning Release Armor, to enhance physical abilities like speed, strength, or reflexes. Using his Lightning Release Armor, A is able to compete, speed and reflex wise, with Minato Namikaze's speed, as well as protect him from a full on Chidori, receiving only a minor wound in return. It is possible that Killer Bee uses his jinchūriki chakra cloak in a similar manner.