Who is Uchiha Itachi's grandfather?

Uchiha Fugaku. According to the plot of Naruto, Uchiha Fugaku is the father of Sasuke Uchiha, the grandfather of Uchiha Itachi and Zuo Liang, and the head of the Uchibo clan. Naruto is the representative work of Japanese cartoonist Kishimoto Masashi. The work was serialized in the Weekly Youth JUMP from 1999 to JUMP No.50 released on 20 14+0 10.