Thread:DazzlingEmerald/@comment-25152698-20141211170148/@comment-25152698-20141211174213

Princeharris1993 wrote: You have to direct chakra to the eyes to even cast the technique. I'm just saying, just because one jutsu allows you to traverse a certain distant in an instant, doesn't mean that another is faster even though is works on a slightly different principle. And last time I check, Sayuri isn't Kaguya, but i see what you mean as a whole, but its a crazy excuse to compare it to a portal that opens to another dimension. IT's not like Kaguya's portals opened and closed inastantly - I mean she 'does have to travel through them.

Chakra is always present in an activated sharingan, so there is no need to "build it up". This is proven true through the fact that Kakashi always needed to cover it with his mask to not use up as much chakra. Not to mention the fact that's how it's awakened in the first place. Chakra is sent through the optical veins to initiate it. Also, you might have noticed by now that Kamui doesn't use hand signs.

The exact amount of chakra necessary to perform a technique is manipulated through hand seals.[1]

There is no chakra that needs to be concentrated, as there are no hand signs involved in Kamui.

Also, why can't Sayuri master Kamui to a degree where she's able to perform it faster than others? We've seen how large Shisui's fireball jutsu was, how fast Kakashi can use chidori.. we've seen people enhance their techniques all the time. There is no reason she can't improve as well.