Why Minato sealed the Kyuubi in Naruto (possible explanation *spoilers*)

Okay so this chapter has finally explained why Minato sealed the kyuubi into Naruto and how Naruto will defeat Madara.

Madara's body composition being similar to that of the White Zetsu was confirmed this chapter by Tsunade:



It was also confirmed this chapter that Naruto's attacks make Shodai's cells go out of control and transform the person into a plant:



So Minato obviously knew that Madara's immortality came from Shodai's cells and thus he sealed the Kyuubi into Naruto so that his chakra would develop the life inducing element that would cause Shodai's cells to transform into plants. He also left the perfect attack in the form of Rasengan to be passed down to Naruto, that can pack enough life energy into a single attack that it would overwhelm Madara's will and cause him to lose control of Shodai's cells in the same way as danzo did.

This also explains why Minato only sealed the Yang half of the Kyuubi in Naruto, since Naruto only need the Yang half as the life energy source and his own Uzumaki features.

So its possible that Kabuto's 6th Coffin is Uzamaki Mito or Kushina and who also had the same life inducing chakra and thats why Madara is afraid of the 6th Coffin since Mito/Kushina is the only one who can kill him since Naruto and Kabuto figured this out through his research of Shodai Hokage's DNA and thats why Madara calls him a shrewd man.

Think we've had this discussion before bro! Admittedly on another forum.

Conceivable that Minato ascertained that who he fought when the Kyuubi was unleashed was either Madara or Hashirama. That is to say those are the only two known to have had any control over the tailed beasts. But how did he know that Madara had found a way to use Hashirama's cells to live longer?

Secondly with the life inducing qualities, other than Naruto this has not been reported at all. How did he know that the Kyuubi's chakra would express itself in this particular way with Naruto?

Imo rasengan is just a jutsu Minato developed whilst trying to emulate the tailed beasts. As for whether he meant it for Naruto or not who knows.

I thought he gave Naruto the yang chakra because he would be better suited to dealing with it. It correlates with the Uzumaki features of vitality etc as it represents the physical.

6th coffin maybe it's Mito, Kushina dunno tbh.

How would he ascertain it. I think from the fact that Madara was not dead and knowing like Tsunade for example that Hashirama's cells granted life-inducing capabilities.

Tsunade did indeed theorise, after analysing the DNA of white zetsu, that Madara may be using the 1st's cells to extend his life. Perhaps by regrowing body parts. E.g. when he lost his right arm as a result of Torune's venemous nano insects.

But Minato never observed anything about Madara that hinted he had the 1st's cells. No mokuton, regrowth of limbs etc. So how did he know?

On an unrelated not how did the 1st hokage die? I know he probably died on the battle field but there was no specific explanation. I'm just wondering if Madara can use his cells to extend his life then why couldn't Hashirama?

The very fact that Madara was there and alive was enough of an observation to come to that conclusion since Minato knew that Madara had fought Hashirama.

Dubious about that part bro. He was a sharp character but making the jump from Madara being alive to him using the Shodai's cells is a bit far for me.

He never named his as Madara either if he had such a strong feeling why hold back?

Well Minato concluded that he was Madara the man that he was dueling with and since he figured out that only a shinobi with a certain skill set could defeat him its not a stretch for him to have realized Madara's innermost secrets just by processing the knowledge of the past and the facts at hand.

Still not sold on that bro. Why didn't he name him as Madara?

When he appeared in Naruto's mind, whilst fighting him and before he sealed the Kyuubi in Naruto he referred to him as the masked man.

Never as Madara.

In the flashback bro where he fought Madara and the Kyuubi when he saw his ability to control the Bijuu he specifically identified him as Madara so its enough for me bro.

http://www.mangafox.com/manga/naruto/v53/c502/10.html

He deduces it to be Madara but dismisses it immediately.

He does go on to say that there is something worse than the Kyuubi, interesting but unrelated!

http://www.mangafox.com/manga/naruto/v53/c503/18.html

He refers to him as the masked man again. From the sounds of it he thought it was Madara for an instant but seems to have let go of that idea. If he really wanted to convince his wife that this was the right thing to do telling her that Madara is behind it would be better than just saying it was the "masked man".