Kekkei Genkai

Kekkei Genkai (血継限界; Literally meaning "a technique limited to inheritance by blood" or "Bloodline Limit") are abilities passed down genetically in specific clans. Kekkei genkai and their related jutsu can't be taught or copied by others, but it is possible to confer the ability to another person if it's localized in a particular organ like the eyes via organ transplant, like Atzuki Uchiha passing her eye to Miyuki Uchiha and  Roze Uchiha. Kekkei genkai abilities that work via the user\\'s eye are called doujutsu.

Kekkei genkai should not be confused with [hidden jutsu]. Hidden jutsu are exclusive to a certain person or clan, but only because they have kept others from learning how to perform those jutsu.