Re: Naruto Manga Chapter 550 Discussion and 551 Predictions
Just because Minato holding the kunai doesn't mean he needed it. In FTG the seal is the destination. Minato always fighting with his Kunais, it's just for practical reason so that he can use the FTG at will.
Originally Posted by Sarutobi Sasuke
Summoning is a space/time jutsu that require a contract signed with blood, the destination would be the place of the summoner. Now there are only 3 people (I assume the 2nd can) that can teleported themself without a contract, a summoner and they basically can choose the destination (with some limitation in FTG). And at least for Madara and Minato they can also teleported someone or something at will.
Now yin in itself is a limiter, although that's not a bloodline limit. Tsunade is a medical ninja which is also a limiter, I presume that her yin seal require her medical knowledge and her yin release, that's why it's harder to be learnt.
You have not provided the plenty other reasons why it's not kekkai genkai, so far you just too obsessed with the use of Fūinjutsu in the FTG. Minato use Fūinjutsu to improve his capabilities in space/time jutsu, just because Sharingan is a Kekkai Genkai doesn't mean you can't use it alongside with Fūinjutsu.
You also can't or don't want to explain why there are no other people who can learn the FTG if that is so simple and if it's not a kekkai genkai. Please remember that FTG is way more useful than Tsunade yin seal in war/combat, so there's no points to keeping it secret if it's that easy. Of course Oro and Danzo would be a master of FTG if that's the case. Along with the 3rd, Jiraiya, Tsunade, Kakashi, etc, etc. Please just don't spring any other jutsus, I'm not interested in other jutsus, just explain to me why there are no other user of space/time jutsu.
As of now the most sensible reason of why only 3 people have space/time jutsu is that is a kekkai genkai. As such, until Kishi prove it to be otherwise or you could convince me then I suggest we wait for Kishi's verdict.