Are you sure you deserve to learn Genjutsu? If the answer is yes, you will first have to represent Itachi Uchiha who masters it perfectly with this Itachi Naruto Japanese T-Shirt.
Itachi (鼬) means "Weasel".
His habit since always was to put his fingers on his brother's forehead.
Itachi is one of the few people who know Naruto's parents.
He likes to eat onigiri and cabbage.
He wanted to fight his younger brother Sasuke Uchiwa.
His favorite word was "Peace.