Hiramekarei

is a double-handled sword of the Seven Ninja Swordsmen of the Mist, wielded by Chōjūrō.

History
According to Suigetsu, this is the only sword still in Kirigakure's possession out of the original seven blades, by the time of the Fourth Shinobi World War. Suigetsu also noted that his brother Mangetsu mastered the use of this sword in the past.

Appearance
The weapon itself features an enormous wide and flat blade with two indentations near its base, creating a sort of guard, and two handles connected to each other by a short length of cord, earning it the title of. It is apparently very heavy, as Chōjūrō tires easily when carrying it for extended periods of time.

Abilities
The two holes at the tip of the blade, are capable of emitting chakra on command, which can then seemingly be formed into various weapons, including a hammer or a sword. The size of the resulting weapon appears to depend upon the amount of chakra stored up beforehand, meaning a larger quantity will be met with a similar increase in the weapon's ultimate size. However, regardless of the weapon's dimensions, the emission and subsequent formation of the chakra always occurs with astounding speed.

Trivia

 * Both hirame and karei are Japanese names for species of flounders. The flounders with their eyes on the left side of their body are called, while those with their eyes on the right side are called . Befitting its name, Hiramekarei is shaped like these fish.
 * Hirame can also come from . Karei can also mean.
 * Mangetsu Hōzuki is the presumed owner of this sword during the time of the previous generation of Seven Swordsmen, as he was one of two not seen with a sword like the other members, when they were resurrected by Kabuto Yakushi. Given that Fuguki Suikazan was the previous owner of Samehada and his sword is currently in the possession of Killer B, only Hiramekarei remained unclaimed.
 * This is the only one of the seven swords not to have a direct kanji translation, due to its name being written in katakana.