Ninjatō
The ninjatō (忍者刀, '&# 39;ninjatō''?), also known as ninjaken (忍者剣, ''ninjaken'' ?) or shinobigatana (忍刀, ''shinobigatana''?) that belongs to the culture of the Japanese being a very important and recognized weapon for being used by the ninjas of the ancient era, the most common name of the saber that a ninja would carry. According to the book Ninjutsu History and Tradition by Masaaki Hatsumi these sabers would have a certain variety of shapes and sizes. However, they were usually shorter than the katana daito, traditionally used by the samurai of feudal Japan.
The typical ninjatō would be a wakizashi or short sword with a katana hilt and saya, which induced in the opponent a miscalculation regarding the time it would take to unsheath the weapon, allowing a faster than expected battoujutsu technique. In addition, its size gave a certain advantage over the katana in combat in closed or small spaces. It also served to disguise the weapon (which could serve to identify its bearer as a ninja) as a common saber. The extra space in the pod could also be used to store or hide small items.
Modern ninjatō is usually straight with a square tsuba (handguard), but it is not historically accurate. According to the same book by Masaaki Hatsumi, the ninja saber was only "straight" Compared to the average of the time, they were much more curved, but maintaining a certain curvature.
The ninjatō was also used for digging and climbing. The scabbard was sometimes used to breathe underwater or have some poison to blow like a blowgun. The ninjatō could be accessorized with a chain that was used to pick it up after being used as support when climbing a wall.