To bring back a soul, the caster needs a portion of the deceased's DNA (flesh) and a living human sacrifice to serve as the vessel.
The soul must reside in the "pure world." This explains why previous Hokages (1st through 4th) cannot be revived, as their souls were sealed away by the Reaper Death Seal . Naruto Shippuuden (Dub) Episode 264
Episode Review: Naruto Shippuden (Dub) Episode 264 – " Secrets of the Reanimation Jutsu " To bring back a soul, the caster needs
Kabuto reveals that the jutsu cannot be stopped by killing the caster. Instead, the caster must be forced or manipulated into performing the hand signs Dog →right arrow →right arrow Tiger and saying "Release." Voice Cast (English Dub) Instead, the caster must be forced or manipulated
The English dub for this episode features a strong veteran lineup: English Voice Actor Maile Flanagan Killer Bee Catero Colbert Kabuto Yakushi Henry Dittman Tobi / Madara Neil Kaplan Anko Mitarashi Julianne Buescher Final Verdict