|Literal English||Weather Eye|
|Appears in||Anime, Manga, Movie|
The Tenkigan (気象眼, Literally meaning: Weather Eye) is the very influential and fundamental dōjutsu used by the Raika Clan. While it is unknown who first bore the eye, it can be assumed that this primogenitor of this bloodline was also the ancestor of the Raika Clan. Known to be exceptionally rare, only Okuyuki Raika utilizes this legendary dōjutsu. However, that may soon change with the incoming generation of shinobi, most notably his descendant, who possesses similar levels of chakra potency and quantity. The eye itself shares little to no genetics with the Byakugan, Rinnegan or Sharingan, leading many to believe that it may have existed before the Ōtsutsuki arrived on Earth, making it a dōjutsu that could very well be older than the world it inhabits.
As previously stated, the eye itself is very old, having existed long before the current timeline, and is rumored to have been in existence before the Ōtsutsuki clan arrived. The eye itself is very powerful and influential, and is thought to be the reason for the Raika's existence, with a bearer of the eye organizing several members of society into a clan that he led. It is later discovered that the first person to attain this eye originally wielded it as a Kekkei Mōra, telling of its prestige. The eye itself appears as a storm gray eye, with traces of silver in the center as well as a silver pupil that is almost non-discernible in its appearance.