Reincarnation jenjei (Earth-2356)

Reincarnation jenjei are Force techniques that usually require or accomplish the transfer of life force between people. These techniques are generally classified as kinjei because the restoration of one life typically requires the sacrifice of the life of another, or that it violates the laws of nature and morality.

Source

 * https://naruto.fandom.com/wiki/Reincarnation_Ninjutsu.