Byakugan

The Byakugan is a genetic trait that is shared amongst the members of the proud Hyuga Clan. Those that inherit the blood of this clan have almost featureless white eyes, which are the focus for many of their dojutsu. Although it is not stated directly in the manga, it is presumed that all members of the Hyuga family possess the Byakugan, unlike the members of the Uchiha, who are not all born with the Sharingan. It is a common belief that the Sharingan is a genetic offshoot of the Byakugan.

Abilities
The Byakugan, as stated above, is the primary focus of the Hyuga's special arts. After awakening the Byakugan, which is denoted by veins along the user's temples surfacing to just under the skin, the Byakugan allows for the user to see with near 360º vision, meaning that they can literally see everything around them, save for one blind spot, which differs from user to user. They also have the ability to see through solid objects, and can use a degree of telescopic sight to see things from a great distance.

However, one of the greatest uses of the Byakugan is the ability to see the chakra circulation system inside of another's body. It is from this paticular ability that they are able to employ their ultimate attack style: Gentle Fist. Much in contrast with typical Taijutsu styles, which is focused on being insanely fast and strong, the Gentle Fist style focuses on being quick, but precise, not focusing on damage. Each strike, when placed correctly, shuts down one of the Tenketsu, or chakra points, along the victim's body, stopping the chakra flow to those areas. Most ninja cannot perform this because the Tenketsu are too small to see. However, the Byakugan allows the Hyuga descendant to be able to see them, and strike with pinpoint accuracy. When performed in quick succession, this shutdown of tenketsu usually leaves the victim unable to use any of their chakra, which is devastating for any ninja that relies on it for their jutsus, or even just that extra burst of speed or strength. Able to strike without force, and yet do more damage to a ninja than some of the most powerful Ninjutsu, the Gentle Fist is one of the greatest Taijutsu styles known within all of Konoha.

Characters who posses the Byakugan

 * The entire Hyuga clan
 * Hinata Hyuga
 * Neji Hyuga