Kubikiribōchō

The is shaped like a giant butcher knife. It has a circle cut out of the top and the semicircle near the handle, which, as demonstrated by Suigetsu, seem to fit the sword's purpose of decapitation aptly, and gives something to wrap a back strap around. Its handle is detachable: Suigetsu Hōzuki was shown screwing it off before traveling and reattaching it for combat. Suigetsu, despite being well-trained, noted that the heaviness of the blade could tire him out easily; a problem Zabuza Momochi didn't had.

Like every other weapon used by the Seven Ninja Swordsmen of the Mist, the sword possesses an unique power, this being its unique ability to reform itself using the iron harvested from its victims' blood. This regenerative process takes place almost instantly, and is capable of bringing the weapon back to its original perfect condition no matter how severe the damage is, from a simple chip or a nick to a completely missing half of the blade.

This giant blade was said to have been used by Mangetsu Hōzuki, but was the trademark weapon of Zabuza during his time as one of the Seven Swordsmen of the Mist. After defecting from Kirigakure, he continued to use it up until his death. It was left beside his grave until Suigetsu took it for himself three years later. In the manga, Suigetsu simply takes the blade from Zabuza's grave. In the anime however, after Zabuza's death, the blade was stolen by Tenzen Daikoku, a crime boss who lost many men to the blade, as a trophy, and was used by one of his bodyguards until Suigetsu took it forcefully.

During Taka's fight with Killer Bee, Bee cuts into the Decapitating Carving Knife, damaging it. When later fighting the Fourth Raikage, the Raikage snaps the blade along the same cut-line that Bee created. Despite being cut in half, Suigetsu continues to use the blade, which now resembles a cleaver. The sword is taken from him when he is captured by samurai. He tries to locate the sword when he escapes, but cannot find it anywhere. Shortly afterwards, during the clash between Kabuto Yakushi's forces and the Third Division of the Allied Shinobi Forces, the sword is shown having been returned to a revived Zabuza, who starts striking down many enemies with it in order to reform its broken blade.