It seals the nine tailed fox spirit inside Naruto's body so the power of the fox wont controll naruto and if it did a catastrophe would have been uleashed since naruto is an junchurriki and the power of the fox has to be sealed so the power wont unleash chaos.
It is a Double tetragram seal with a 8 sign seal, so that if any of the 9 tails chakra is released it will form into Naruto's chakra. It then has a 5 Pronged seal in witch Orochimaru put there to fully suppress the 9 tails chakra to make Naruto weaker
yes he does he tries to cut narutos stomach and release the demon
im pretty sure it he should up in the first episode because they were showing all that happend to the town and they showed how narutos dad sealed it away in narutos stomach
yes he does but he shows up when he was about to ripp the seal off of his jinchuuriki
I'm guessing because the kyuubi wants naruto to use his power, not to seal him away and never think about him again.
sakura
No.
Naruto's dad used part of his chakra and his wife's (naruto's mom) chakra to seal the Nine-tailed fox inside Naruto. They aren't the seal but they are there to help Naruto control the demon fox. Naruto's dad saves naruto from being overwhelmed by the fox, and in the most recent manga (495 or thereabouts) his mom helps him defeat the fox.
B
He has no sisters.
October 10
narutos dad and 4th