Negative Emotions Sensing

Kurama, 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 it close to escape numerous times before Naruto removed and took control of its chakra himself.

When Naruto achieved Nine-Tails Chakra Mode, he in turn gained Kurama's ability to sense negative emotions. He was able to sense Kisame Hoshigaki while he was hiding inside Samehada, even though Kisame and the sword both shared the same chakra signature. According to Tobi, 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.