Ninja Sword is the first gem-priced weapon available in Shadow Fight 2. It is unlocked at level 4 and has the Precision enchantment. It is used by the bodyguard Ghost and one of the Ninja fought throughout Act I and II. It is also the weapon used by a young Sensei as well as Harbinger during Old Wounds in the Special Edition.
- The weapon is mostly refered to as ninjatō (忍者刀), ninjaken (忍者剣), or shinobigatana (忍刀). Ninjatō are allegedly the preferred weapon that the Shinobi of feudal Japan carried.
- Historically, there is no physical evidence for the existence of this "katana-like short sword legendarily used by ninja" before the 20th century, though it is believed that the designs demonstrated by alleged replicas are based on the design of the wakizashi or chokutō swords or the swords associated with Ashigaru, foot-soldiers employed by the samurai class of feudal Japan.