A secret taijutsu that is orally handed down only within the main house of the Hyūga clan.
This technique utilises the chakra control gained through Gentle Fist training to release a huge amount of chakra from all the chakra points on the user's body. It is also a defensive manoeuvre to compensate for the Byakugan's blind spot as the released chakra blocks any possible attack on the user. After releasing chakra from every tenketsu in their body, the user then spins rapidly to parry the attack, both creating a rotating shield of chakra around themselves and tossing away any nearby attackers. The user can also actively control the size and power of the sphere to suit the situation. The technique is also capable of reflecting an opponent's chakra against them.
This technique is only effective when rotating, since the chakra itself is not enough to stop a physical attack thus if they cannot spin, the user becomes vulnerable. The chakra rotation can be disrupted by chakra threads, which slows down the user, binding and tangling them in the webbing for example, and ultimately forcing them to stop.
"Kaiten" (回天, Literally meaning: "revolving heaven") is a term used to refer to turning the tides or fighting back up from a weak position. When written as "回転" (kaiten), it means "revolving" or "spinning". This technique in a way, combines both words into one.
Neji Hyūga learned this technique via observation and sheer talent, as he was a branch family member and it wouldn't have been taught to him. In the anime, Hizashi Hyūga also demonstrated the use of this technique.
In the anime, this technique can block opponents' attacks without spinning. In the manga, it was not able to, but it was able to divert projectiles slightly.
In the anime, it is revealed that this technique can reach the speed of up to about 1200 km/h (745.6 mph), and if any opponent can outrun this speed in the direction of the rotation, it will breach the defence.