Board Thread:Theories and Speculation/@comment-30241447-20170503042327/@comment-734582-20170508090836

Namikazenaruto9 wrote: They were sealed without any regard to itachi's chakra as you claimed. And if TTJ were to get hit he would too be sealed. No amount of feat would save him from that also their was a particular reason why some people didn't get edo tensei'd or get to show their power in the series. I think we should respect author's reason for doing so rather than twisting this very reason around to imply their weakness. Nagato is an Edo Tensei. We've seen ET's being sealed with simple tags. Orochimaru was sealed in Sasuke, and Sasuke's chakra had to be nearly entirely drained for Orochimaru to come out. Compare that to the Juubi, where Hashirama's sealing gates were shattered like toys, yet we saw similar torii hold down Kurama. Naruto's chakra is also much greater than Sasuke's, as Kakashi implies Naruto has over a hundred times his chakra just to hold back Kurama.

Ergo, by simple deduction the Torii held down stronger beings than the Totsuka sealed, yet failed to hold down the Juubi. There's no reason to believe the Totsuka can seal the Juubi. it's just an assumption, and that assumption you can test with the "if it's so strong, why did Itachi not use it" method. In which case i end up with "because it's not so strong".