Samekugi

Samekugi (鮫釘; Literally meaning "Shark Nail") is the term used for the Samebito clan's signature sword. The swords get their name from their appearance, each one is a single large spike or scale in a hilt.

The Samekugi shares many abilities with Samehada, though they are not sentient. This means they can be used by anyone and the user cannot be betrayed by the blade itself. As the Samekugi are made of a single upward scale rather than a group of downward spikes they act like a normal sword, cutting rather than shredding or shaving. The scale of the sword is rigid but the hilt may extend, stretch and bend, giving the Samekugi greater range. The Samekugi can act as a container of chakra, allowing the user to use it to absorb chakra from people and even techniques and then use it to replenish their user's chakra and stamina, or even heal fatal injuries. A major difference between the Samekugi and Samehada is that the Samekugi and its user cannot fuse, it is implied this is either because it is not sentient or does not possess its own chakra signature.

Most Samekugi are chokutō and multiples of these are carried, though some Samebito may use Samekugi in the form of katana.