Board Thread:Naruto Discussions/@comment-26773508-20150905054531/@comment-734582-20150905130536

BakumatsuWarrior wrote: '''Why didn't Minato reseal Kurama into Kushina so that she would survive? If resealing Kurama wouldn't have saved her, then how did Naruto escape death through the resealing of Kurama?''' Because of two major differences: the presence of a medical shinobi, and strength. Naruto was granted immense strength by Hagoromo's power. Kushina was extremely weakened. There was no medical shinobi to heal her either.

Experimentation with this would be extremely difficult. If a Jinchuriki dies, the chakra of the beast is scattered. So resealing the beast has a high chance of losing it entirely. There's likely a strength factor involved too, as Kushina was already extremely weak and likely would not be able to restore the seal fully to keep Kurama in. Kurama's power is immense, but it either requires the beast's desire to live to force a Jinchuriki to stay alive (how naruto's Phase 1 cloaks worked), or the Jinchuriki's strength to command the Biju's power (like Kurama Chakra Mode). Kushina had neither.

Lastly, it's strange that Minato had a little altar ready to be summoned and the sealing formula ready. I think there's a good chance that this was Plan B all along. children become Jinchuriki because they still have time to adapt to the Biju. The chance of the seal breaking, or Kushina dying during childbirth was real, so it's likely that Minato had this in mind all along, although the Reaper Death Seal was likely something he did out of desperation. So in case the seal failed, Naruto was always going to be it's next jinchuriki, though i would like to think Minato would've chosen alternative methods of fighting Kurama if he was given the chance.