It almost did when Naruto was in 8 tailed form while fighting with God Realm Pain. Naruto ,while in 8 tailed form was uncounciusly talking with the Demon Fox. The Demon Fox persuade naruto on taking off the seal and Naruto almost take it off, that's when his father, the 4th Hokage appear as a memory and pull naruto away from the Demon Fox and tell naruto that he is his father and tell him stuff about the time when the Demon Fox attack Konoha. For more info read Naruto manga chapter 440 - 441.
when naruto uses the nine tails power and loses control he is tempted to break the seal and realse the fox. the is also a key to the seal which can be used to open the seal a small bit, close it, or fully remove it.
As a matter of fact, in the current manga chapters he released 8 tails so far. He went into that little mind realm of his where the fox resides. He walks over to the seal to take it off. Right before he is able to remove the seal, Yondaime comes to him in his conscience and tells him that he would come if 8 tails were ever released. So as of right now, no the seal didn't break.
2 people. Hinata tries but fails then Naruto goes to Kyubi when he is about to break seal. Fourth Hokage comes in his subconscious mind and helps him redo the seal.
The 4th hokage Minato sealed the nine-tailed fox inside naruto
yes it was broken then the illusion of the 4th hokage came and sealed it again
Yes he let if free from kishuna idk about naruto cause its only 9-7-12
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.
Prior to Naruto being Kyuubi's jinchuuriki, Naruto's mom, Uzumaki Kushina, was Kyuubi's second jinchuuriki. When Naruto was born the seal grew very weak and Madara managed to break the seal and use the Sharingan to control Kyuubi's mind and force him to attack Konoha. Nobody really sent him, he was freed from his seal but then the Yondaime sealed him into Naruto.
Yes, I'm pretty sure during his execution in Twilight Princess he broke the seal using the Triforce of power.
it comes from the forbudden jutsu called death reaper seal
he used a sealing jutsi on naruto to seal the nine tailedfox.
Naruto meets his father in his subconscius, while trying to release the full seal of the Kyuubi when fighting against Pein. Yondaime (AKA the FOURTH), Namikaze Minato appears telling that the seal reacts in such a way that he will appear if eight tails have been released, ant that though he didn't want to se fox again he wanted to see his son (naruto hears this)