Ibuse

is a poison salamander and Hanzō's signature summon. It was large enough for its summoner to stand on top of its head. When battling alongside his salamander, Hanzō was powerful enough to fight, and eventually overpower, all three of the Sannin.

Abilities
This salamander is able to release a Poison Mist from its mouth, which is capable of making the entirety of a victim's body numb just moments after inhalation. This poison must first be generated and stored for five minutes within Ibuse's body before using this technique.

Shinobi World War Arc
During the pursuit of members of the Surprise Attack Division, Hanzō summons Ibuse, who poisons the Allied Forces shinobi.