It is revealed later that Sasuke is the sole survivor of the once-powerful Uchiha clan of Konohagakure. He, at the age of seven, survived the massacre of his clan perpetrated by his brother, Itachi, who spared Sasuke's life because he did not consider him worth killing.For over a decade, Sasuke willingly chose to abandon his family in pursuit of more information regarding Kaguya and the Otsutsuki Clan. He traveled through Kaguya's dimensions and got nothing. He chose this mission as he felt the.