Dōjigiri

Dōjigiri (童子切, "Slayer of Shuten-dōji") is a tachi-type Japanese sword that has been identified as a National Treasure of Japan. This sword is one of the "Five Swords Under Heaven" (天下五剣 Tenka-Goken).

Dōjigiri is sometimes called "the yokozuna of all Japanese swords" along with Ōkanehira (ja:大包平) because of its perfection; it is of great historical value as one of the oldest extant katana-type weapons. The quality and the artistic value of the blade is exquisite, it has been kept in good preservation, and the legend tied to the sword is notable.