The Seven Ninja Swordsmen Of The Mist

The Seven Ninja Swordsmen of the Mist (霧の忍刀七人衆, Kiri no Shinobigatana Shichinin Shū) is an organisation consisting of only the greatest blade wielding shinobi of their generation that Kirigakure can produce. There can only be seven members at a time, hence the name. According to Suigetsu Hōzuki, the swords of the Seven Swordsmen are passed down from generation to generation.The members of the Seven Ninja Swordsmen were the people who came from the Bloody Mist's graduation exams with the greatest battle skills. However, the members also had a great lust for power, which led some of them to defect and become missing-nin, one example is Zabuza Momochi. Kisame Hoshigaki became a member after killing Fuguki Suikazan, who was revealed to be a traitor leaking information to the enemies, but Kisame later became the first of the seven to abandon Kiri after committing several unauthorised assassinations, and attempting to overthrow the government, then joiningAkatsuki afterwards. Zabuza Momochi would later defect as well after a failed coup d'etat and assassination attempt on the Mizukage. Before leaving however, he encountered a boy named Haku with a unique kekkei genkai and decided to take him along, as well as the Demon Brothers, Gōzu and Meizu. Since then, the total number of the group gradually decreased, as the swords one by one fell out of Kirigakure's possession. Eventually, Kirigakure was left with only one sword, and Chōjūrō became the only member of the Seven Swordsmen of the Mist.

According to a ninja from the Allied shinobi forces, the generation closest to the Fourth Shinobi World War was the strongest of the Seven Swordsman in the entire group's history, having been composed of the most powerful seven among the ninja that had ever been a part of this group; they are all dead by the time of the war for various reasons.

The Hōzuki brothers, Mangetsu and Suigetsu, both trained with the intention of joining the Seven Ninja Swordsmen together. Mangetsu did eventually join, and mastered use of all seven of the swords, rather than one. However, he later died, and Suigetsu was captured by Orochimaru. Suigetsu now shows an interest in collecting all seven swords, in order to restore the group to its original power and become its new leader.

In the anime, it hasn't been confirmed when or why Raiga Kurosuki left Kiri, but it was around the same time when he discovered a boy named Ranmaru, who ended up having a similar relationship with Raiga to that of Zabuza and Haku. Ranmaru also had a special dōjutsu which Raiga used for his own purposes, furthering their similarity to Haku and Zabuza.

Shinobi World War Arc

During the Fourth Shinobi World War, Kabuto Yakushi used the Summoning: Impure World Reincarnation technique to reincarnated the previous generation of the Seven Ninja Swordsmen of the Mist to fight on behalf of Akatsuki, the said generation being the most powerful in Kirigakure's history. Zabuza being part of the group that attacked theAllied Shinobi Forces' Third Division, Gari and Pakura summoned the remaining six to the battlefield.^[ Mangetsu then summoned most of the swords with a scroll, and most of the swordsmen got an advantage against the Third Division, being covered by Zabuza's Hiding in Mist Technique. By the second day of war however, all members of the previous generation were eventually sealed.

Swords (Credit to Naruto Wikia For Info)

Kubikiribōchō (首斬り包丁; Viz "Executioner's Blade"; Literally meaning "Decapitating Carving Knife"): A giant sword with a butcher-knife-like appearance, the wielder can use the semi-circle on the blade to decapitate an opponent's head, hence the name. The sword has an ability to regenerate using the iron absorbed from the blood of those it cuts down. It is also called a "Seversword" (断刀, Dantō).

Samehada (鮫肌; Literally meaning "Shark Skin"): The most terrifying of the seven blades, it has the appearance of a giant knife covered in shark scales. It is a sentient, living weapon and has the ability to "eat" chakra. It is also called a "Greatsword" (大刀, Daitō).

• Nuibari (縫い針; Literally meaning "Sewing Needle"): A sword in the shape of a needle with a long thin wirethat resembles thread attached to it, which can be used to pierce enemies and "sew" them together in human bundles. It is also called a "Longsword" (長刀, Chōtō).
• Kabutowari (兜割; Literally meaning "Helmet Splitter"): A sword consisting of a single sided axe and a hammer joined by a length of chain. Said to be capable of crushing any and all defences. It is also called a "Bluntsword" (鈍刀, Dontō).
• Shibuki (飛沫; Literally meaning "Splash"): A sword that has a scroll full of explosive tags incorporated into it, lined up behind the blade, combining swordsmanship and explosions. It is also called a "Blastsword" (爆刀,Bakutō).
• Kiba (牙; Literally meaning "Fangs"): Twin swords that are imbued with lightning which increases their cutting power. They are said to be the sharpest swords ever forged. They are also called "Thunderswords" (雷刀,Raitō).
• Hiramekarei (ヒラメカレイ): A bandaged double-handled sword that is capable of storing and emitting the user'schakra which can then take on various forms. It is also called a "Twinsword" (双刀, Sōtō).