Authority of the Gods
Space-Time Migration (時空間移動, Jikūkan Idō)
Anime, Manga, Game and Movie
Kamui is a powerful technique originating in the Mangekyō Sharingan eyes of the Uchiha Clan, which only certain members can awaken. It has been said that if one spends a lot of time and trains one's chakra over and over again, this technique can be invoked. It is connected to a unique dimension in space-time.
Using the left eye, target is enveloped with a barrier space and the user concentrates their mind to what they gaze at. The target can struggle helplessly, but against this technique no defense is possible. When the technique is invoked, the space at the center of the barrier is distorted and the target inside the barrier is drawn in completely. The location and size of the barrier can be specified at will. It is a dreadful technique that, with skilled use and enough chakra, can even pull an entire human being into another dimension.
The user is also capable of teleporting other people or objects to a separate dimension, through the same swirling pattern, centered upon their right eye. However, instead of teleporting the targeted component, this particular usage's effect acts as an attractive force, both visibly drawing the target inwards and distorting their form until they disappear. After absorbing targets through this process, the user is able to eject them at any time of his choosing, with varying degrees of force. In doing so, he or she is able to attack using weapons of gigantic proportions and/or quantities with relative ease and at a moment's notice, giving opponents little opportunity to react accordingly.
Unlike with the right eye, this form of the technique requires the user to make direct physical contact with the intended target, leaving he or she vulnerable as they cannot be intangible when doing so. Despite not always being present, the user can keep their targets under genjutsu whilst they are confined inside this pocket dimension and thus, keep them incapacitated for extended durations.
By creating a swirling, spatial distortion centered upon their right eye, the user is able to enter a dimensional void and teleport himself to another location instantaneously, exiting this void in a similar manner to how he entered. During this process, the user's chakra becomes untraceable until the teleportation is completed. By his own admission, Tobi can locate anyone and teleport to their current destination regardless of their whereabouts, evidenced by how he immediately found Taka as they were traveling to Konohagakure, as well as Minato Namikaze, who himself had teleported away from Tobi.
Using this technique, the user is also able to render himself intangible to allow other objects to pass harmlessly through his own body, which he employs primarily to avoid incurring injury from incoming attacks. In actuality, this is but another extension of space–time ninjutsu, where by the user instead teleports any part of their body that occupies the same space as another object to a separate dimension. As the transported portions of his body are always obscured by the other objects, their appears completely whole to those observing him. By overlapping their entire body with a sufficiently large object, such as the ground, they can not only conceal himself from view, but also erase all traces of their chakra. Tobi often exploited this characteristic to ambush his opponents from below.
Though unable to establish any physical contact while intangible, the user can still use chakra chains. They also seemingly possesses the capability to extend this intangibility to whatever they're presently touching, as long as they is able to maintain some form of contact with at least part of the desired item.
The Mangekyō Sharingan is a dōjutsu that, with continuous usage, burdens the user with the loss of their eyesight. Since this is the source of Kamui, using it in rapid succession puts the user's body at risk as well. As his Sharingan was transplanted, usage of this technique poses an even greater risk to Kakashi and others like him.
Transplanted users are able to use this technique up to at least three times in a given day, even when starting at full strength. At first the user's aim and control over the size of the barrier is imperfect. Over time his or her aim and control improves, as they are able to accurately warp away small and fast moving objects, such as a nail. Kakashi, for example, is even able to consecutively warp away two fast-moving arrows.
The primary weakness of this technique is that both aspects cannot be used concurrently, as the user must become and remain tangible in order to transport themselves or others, providing a small opportunity in which they are unable to pass through objects and thus, is vulnerable to injury. This deficiency means that they must also materialize when ejecting stored items as well, presenting the same vulnerability. According to Konan, Tobi could only maintain his intangibility for approximately five consecutive minutes at a time, after which he is presumably rendered completely solid for a duration. She also reveals that the time it takes him to absorb something is proportional to its mass, and that it takes longer to absorb himself than another person or object. These weakness also apply to other users.
Additionally, due to the nature of the user's intangibility, the sections of his body residing in the other dimension can still interact normally with other objects that are also contained within this dimension, meaning they can be damaged by such items. That means anyone able to use this technique or a Sharingan Space-Time Ninjutsu can damage them.
- Tobi has told Kakashi not to bother trying to use this technique on him as it would be useless. This was later revealed to be due to the fact both men were using the same technique, thus sharing the same dimension, making the attack rather pointless.
- The Third Databook seems to hint that other Mangekyō users can access the technique, though this is unconfirmed.
- Kamui is the word for a divine being in Ainu mythology, although it is almost never written with kanji in modern times. In a more general Japanese context, Kamui refers to the might and majesty of the gods, particularly the Shintō Kami.