Tsukuyomi isn't always a one-shot attack. It depends on many factors

[Owarij]

Well i believe it should be obvious. Something longer should take much chakra. Infinite tsukuyomi is a perfect example.

Infinite tsukyommi happens in real time...not to mention the major thing is that it's a LARGE genjutsu being cast on the MOON.. that's why it takes so much chakra// not because of length.. you're assuming things....Itachi used a excuse as to why he was retreating..in p2 he was shown to be more than capable of using 1 amaterasu, 1 tsukyomi.... 3 years after that incident with sasuke... when his sickness was at it's peak.

You're assuming things, Giving itachi limits to his tsukyomi, when nothing like that was even suggested.

 

[Boston Rob]

You forget the chakra level here. More the tsukuyomi illusion takes long, more the chakra it requires. I don't believe Itachi can make a month of tsukuyomi if a 72h already makes him sweat as hell. Maybe even 1week would be too much for him to handle because of the chakra level it would require to maintain the moment of the illusion for that long. Concerning Hidan, i didn't said he didn't feel pain, but that he is enjoying the pain and it's what Hidan does, and it's for that reason that i believe that if Itachi uses his tsukuyomi to try to torture him like he did to Kakashi, it should not work on him

The point is not to know if Itachi could have killed them or not, but to show the purpose of the jutsu tsukuyomi and why it may not work against some opponents

Where is none who can survive it except the real uchiha. When tsukuyomi is cast on a victim he is at users mercy. User will decide he survives it or not.

 

[blackstar9]

It's not a one shot attack but when your under tsukuyomi you can't move he could kill you at any time he wants

I'm not sure it can't be a one shot. Kakashi wondered why itachi didn't kill him. Implying that itachi could have with tsukiyomi.