My attic is only full of cellulose insulation and vacuum bags of old clothes. It hasn’t produced so much as a small knife, let alone a 500 year old samurai sword. The attic of the Kasuga Taisha shrine is much, much cooler than mine.
The sword appears to be in very good condition, showing little evidence of use and remains close to its original state. After repolishing and appraisal, it has been attributed to the Ko-Hoki School. The accompanying Kuro-urushi- yamagane (black lacquered mountain iron) tachi mountings are thought to date from the fourteenth century. The sword is believed to have been dedicated to the shrine sometime during the Nanboku-cho (1336-1392) and early Muromachi (1336-1573) periods.
The blade is unsigned, but as it bears a close resemblance to the famous Doji-giri sword in the Tokyo National Museum by the Ko-Hoki mastersmith Yasutsuna, and it is thought that it could be his work as well. The Doji-giri is known historically as one of the Five Greatest Swords Under Heaven. Motoki Sakai of the Tokyo National Museum said that the sword discovered at Kasuga Taisha “is a very important example of work of the period in excellent condition.”
The blade was given to a Master sword-polisher for restoration.
The sword was sent for restoration to polisher Koshu Hon’ami, who is a Living National Treasure. Hon’ami has re-polished the sword back to its original splendor. The Hon’ami family is said to have been sword polishers and appraisers since as far back as the Kamakura Period, and were later employed by the Tokugawa Shogunate in the Edo Period. They also issued appraisal certificates and valuations for important swords, as well as compiling various sword compendiums.
That work complete, the sword will now be put on display.