genjutsu is of the five senses
pain fell into j-mans genjutsu cos he took him by surprise with sound genjutsu, (sense of hearing) so with the 5 senses even itachi can enter j-mans genjutsu
no body is immune to genjutsu
buh itachi can only cast genjutsu with his eye............and i don't think it will work on nagato seeing he has a doujutsu also
Itachi dosen't only use his eyes.
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He used Genjutsu by simply pointing a finger.
2. Having a Doujutsu dosen't make you immune to Genjutsu, where you get that from.
Sasuke has a Doujutsu yet Itachi still used Genjutsu on him.
Kakashi had a Doujutsu yet Itachi stil used Genjutsu on him.
Dude only Sharingan posses Genjutsu reversing abilites and techniques. NOT Rinnegan.
Show me where it says Rinnegan posses ability to counter Genjutsu.