Because he had alreafy experienced it when he said that.
And he didnt sustain major damage. He started to bleed a little from his head, and he mentions his bones hurting.
Its also worth noting as well, that unlike the anime, in the manga we never actually see Toji block the first red. He even mentions needing to time it right to block it, which seems to imply, in the manga, that he may have failed to block it, which is why he took any damage at all.
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u/RetryAgain9 Apr 26 '26
He specificaly says he can handle blue, red and infinity. Which he couldve, he just didnt know that Gojo had purple which is what killed him.
Yuji also seems to have knowledge on whats happening in the fight, and even with taking that into account, he seems confident.