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National Treasure

Long Sword (Tachi)

太刀 銘安家
Long Sword (Tachi) (太刀 銘安家)
PLATE IImage: Kyoto National Museum, via ColBase — CC BY 4.0
At a glance — Metalwork · Heian period, 12th century · held by Kyoto National Museum · designated National Treasure of Japan.

Fact Sheet

Designation
National Treasure (国宝)
Category
Metalwork
Date
1101–1200
Dimensions
Length77.3cm:Curvature3.2cm
Catalogue ID
cobas-2918

Find more

Yasuie was a famous sword-blacksmith in Hoki Province (today's Tottori Prefecture) in the late Heian Period. The width of the sword is relatively narrow and the curving is quite high, making for a classic and elegant shape. Although the well-forged Itame-hada texture looks similar to the Ko-bizen type. this texture is more characteristic and its color darker. This sword is the only extant piece bearing Yasuie's inscription.

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

Record & Sources

Cite this page: “Long Sword (Tachi)（太刀 銘安家）.” Treasures of Japan, catalogue no. cobas-2918. Kyoto National Museum. https://treasures.yamato-kenkou.com/treasures/long-sword-tachi/ — entry last verified 1 November 2026.
Full record data (as published in the official catalogue record)
  • Category: Applied arts:Arms and armor:Blades:Tachi|Applied arts:By media:Metalwork|Applied arts:By region:Japan
  • Cultural property designation: National Treasure
  • Genre: Metalwork
  • Size: Length77.3cm:Curvature3.2cm
  • 員数: 1口
  • 種別: 工芸:武器・武具:刀剣:太刀|工芸:素材別:金工|工芸:地域別:日本
  • 分類: 金工
  • 時代世紀: 平安時代 後期 ・12世紀
  • 法量: 刃長77.3cm:反り3.2cm

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