Negative Emotions Sensing

The Nine-Tails, self described as a being made of pure malice, is able to sense negative emotions, such as hate and killing intent of any individual around it. The Nine-Tails used this ability to find Naruto's inner hate which has brought him close to escape numerous times before Naruto removed and took control of it's chakra himself.

When Naruto achieved his Nine-Tails Chakra Mode, he in turn gains the Nine-Tails ability to sense negative emotions. He was able to sense Kisame Hoshigaki while he was hiding inside Samehada even though Kisame and Samehada shared the same exact chakra signal. According to Madara Uchiha, Mito Uzumaki also possessed this ability.

Trivia

 * Due to this technique, Naruto was key in finding the transformed White Zetsu Army that was wreaking havoc on the Allied Shinobi Forces during the first night of the Fourth Great Shinobi World War.