Full length 'Kinai-Bori' or 'Echizen-Bori' carving on an Echizen katana. It appears to be inscribed with a name: "Sword of the Last Days." The last days were WWII when the Japanese were commanded to carry their swords on them during battle .
shirasaya; Japanese sword mountings. ... Koshirae (拵え) refers to the ornate mountings of a Japanese sword (e.g. katana) used when the sword blade is being worn by its owner, whereas the shirasaya is a plain undecorated wooden mounting composed of a saya and tsuka that the sword blade is stored in when not being used.