Кидо изисква време за кастване.

И как точно Кеншин няма да бъде повлиян от илюзията ? Става на въпрос за маниполация на всички сетива.Колкото и развити да са тези на Кеншин няма просто по какъв начин да предотврати ефекта

Aizen's zanpakutō is Kyōka Suigetsu (鏡花水月, lit. Mirror Flower Water Moon). In its sealed form, it looks like a normal katana. Its shikai command is "shatter" (砕けろ, kudakero). The phrase kyōka suigetsu suggests its illusionary properties; the moon reflected in water and a flower in a mirror are things that can be seen but not held. It is a Chinese saying for seeing and desiring something that is a dream that cannot be easily grasped in hand, teaching people about temptations.

Kyōka Suigetsu's shikai has the ability to place anyone who sees it under a state of "absolute hypnosis" (完全催眠, Kanzen Saimin), after which Aizen can make them see whatever he wants. The hypnosis is unbreakable, even if the target is aware that they are hypnotized. The only way to avoid the effect is to not see Kyōka Suigetsu at the moment of its shikai release, making the blind Kaname Tōsen immune to its effects. The effect seems to be permanent, or at the very least long-lasting, as Aizen uses it on nearly all of the lieutenants and captains in the Gotei 13 during a ceremonial release of his zanpakutō well before faking his own death. While the illusions Kyōka Suigetsu creates are quite powerful, they are not perfect; Captain Retsu Unohana was able to detect something was amiss with Aizen's fake corpse, even though she did not realize what until seeing Aizen alive.

Kyōka Suigetsu's hypnotic abilities make it a useful tool in combat as well, as Aizen can quickly create simple illusions to deceive opponents. By creating a decoy of himself, Aizen can hide his own movements and attack with impunity; his opponent, meanwhile, will remain focused on the illusion until it's too late to react. The most prominent example of this is his brief fight against Sajin Komamura, where an illusionary copy of Aizen is seen melting away after the real Aizen has moved close enough to use the devastating Black Coffin spell.

.....и как ги изчисли тея стотици години боен опит .....и не, Кеншин не е машина за трепане

Аз пък си мисля, че го беше показал по време на оная церемония просто защото там са били много Шинигамита и по този начин е въздействал на голям брой хора едновременно. А не заради някакви специални изисквания.