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Important Cultural Property

Blade for a Long Sword ("Katana")

刀
Blade for a Long Sword ("Katana") (刀)
PLATE IImage: Tokyo National Museum, via ColBase — CC BY 4.0
At a glance — Swords & Armour · Nanbokuchō period, 14th century · held by Tokyo National Museum · designated Important Cultural Property of Japan · Osafune Tomoshige.

Fact Sheet

Designation
Important Cultural Property (重要文化財)
Date
1301–1400
Creator
Osafune Tomoshige (長船元重)
Location
Ueno, Tokyo
Catalogue ID
cobas-166385

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This sword was handed down by the Echizen Matsudaira Clan as a sword used by Yuki Hideyasu, the second son of the samurai ruler of Japan, Tokugawa Ieyasu. The length of the blade was subsequently shortened, and the signature of the swordsmith has been lost. However, it is believed to be the work of Motoshige, a swordsmith of the Osafune school from Bizen Province, an area located in southwest Japan. Motoshige was active during the 14th century. The blade is wide with a shallow curve and a long, straight tip, all distinctive features of swords from that period. Another major highlight is the sword's temper pattern, which is made when the blade is hardened. This pattern, which runs the length of the blade, seems to slant downwards, and exemplifies the unique characteristics of Motoshige's swords.

The sword's beauty can be better appreciated by viewing it from several different angles. The sword’s mounting and sheath display an unconventional beauty with a red lacquer coating decorated in gold and silver. In Japan, some of the largest and most robust swords were created in the 1300s, an era when the samurai began to fight more on foot rather than on horseback. This one, crafted by the master swordsmith Motoshige, illustrates this trend with its large point and wide blade. Originally longer, it was later shortened to make it easier to use in close quarters.

— Museum description: Tokyo National Museum (CC BY 4.0), via ColBase / Japan Search.

Record & Sources

Cite this page: “Blade for a Long Sword ("Katana")(刀).” Treasures of Japan, catalogue no. cobas-166385. Tokyo National Museum. https://treasures.yamato-kenkou.com/treasures/blade-for-a-long-sword-katana-tokyo-national-museum/ — entry last verified 1 November 2026.
Full record data (as published in the official catalogue record)
  • Genre: Arms & Armor
  • Category: Applied arts:Arms and armor:Blades:Katana
  • Cultural property designation: Important Cultural Property
  • 員数: 1口
  • 分類: 刀剣
  • 種別: 工芸:武器・武具:刀剣:刀
  • 銘文等: 無銘 伝元重

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