The Katana (also known as the Ninjago Sword) is a common Ninja weapon included in numurous LEGO Ninjago: Masters of Spinjitzu sets. It appears as a black sword with a leather wrapped hilt, a very small, flat guard, and a long, thin blade with a slight curve away from the cutting edge.
Early in Ninjago's run, the katana mold was upgraded, making the blade slightly shorter and straighter. The plastic is also slightly sturdier and shinier than before.
The foot soldier of Ninjago's fighting force, this simple blade is sharp and reliable. While it won't win any beauty contests, it cuts clean and gets the job done.