Name: Samehada (鮫肌; Literally meaning "Shark skin")
Wielder: Kisame Hoshigaki
Debut (Anime):Naruto Episode 81
Debut (Manga): Chapter 141
Samehada is a large unique sword of comparable size to Zabuza Momochi's Decapitating Carving Knife. Unlike a regular sword, Samehada is covered in large scales that shave instead of cut, much like a shark's skin (hence the name). It also has the ability to absorb any chakra around it, allowing Kisame to literally cut through his opponent's chakra. The amount that it can absorb is unclear, but it can even consume the demon fox's chakra with no ill effects.
Samehada is also a sentient weapon and only allows Kisame to wield it. In the words of Kisame, "It acknowledges only me." When Might Guy attempted to hold Samehada and use it against Kisame, it responded with a flurry of spikes protruding from its handle and found its way back to Kisame. This weapon is also highly sought after by Taka member Suigetsu Hozuki, and is stated to be the sole reason Suigetsu joined Sasuke in his hunt for Itachi Uchiha. Suigetsu believes that he will be able to wield Samehada if he kills Kisame, but it is unknown if this is actually true.