Susanoo wielded a blade which was curved in nature and resembled a dagger or tantō rather than a sword. Itachi demonstrated the ability to manifest this blade while only forming his Susanoo's ribcage and arms, during his battle against Kabuto Yakushi. With it, he was able to cut through Kimimaro's bones, which were stated to be harder than tempered steel.

A sword is a long, bladed weapon used for combat. While most swords in Naruto are traditional Japanese katana, tantō, or ninjatō, swords used by main characters tend to bear little resemblance to real-life weapons, as is the case with the Seven Swordsmen of the Mist's swords. Other swords that have been introduced in the series have mystical or special powers, including Orochimaru's Sword of Kusanagi and the Sword of Totsuka as wielded by Itachi Uchiha's Susanoo.

It is sheathed in a sake jar; the blade is actually the liquid inside the gourd that is released and shaped, rather than a conventional sword. It is an ethereal weapon, with an enchanted blade capable of sealing anything it pierces. Those who are stabbed by the sword are drawn into the jar and trapped in a genjutsu-like "world of drunken dreams" for all eternity.

The Yata Mirror was equipped to Itachi's Susanoo, in its left hand and, is considered one of the three sacred treasures. It is said to be endowed with all nature transformations and as such changes its own characteristics depending on those of the attack it receives, making the attack entirely ineffective. Zetsu claimed that this, combined with the Sword of Totsuka held in its right hand, essentially made Itachi's Susanoo invincible.