Treasures of JapanA catalogue of Japan's designated cultural properties
2,690 works catalogued

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Important Cultural Property

Long Sword (Tachi), Signed "Sanemitsu of Bizen Osafune

太刀 銘備前国長船住人真光
Long Sword (Tachi), Signed "Sanemitsu of Bizen Osafune (太刀 銘備前国長船住人真光)
PLATE IImage: Kyoto National Museum, via ColBase — CC BY 4.0
At a glance — Metalwork · Kamakura period · held by Kyoto National Museum · designated Important Cultural Property of Japan.

Fact Sheet

Designation
Important Cultural Property (重要文化財)
Category
Metalwork
Date
1185
Dimensions
Length74.8cm:Curvature2.4cm
Catalogue ID
cobas-2910

Find more

This tachi (long sword) was made by an artisan of the Osafune school.

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

Record & Sources

Cite this page: “Long Sword (Tachi), Signed "Sanemitsu of Bizen Osafune（太刀 銘備前国長船住人真光）.” Treasures of Japan, catalogue no. cobas-2910. Kyoto National Museum. https://treasures.yamato-kenkou.com/treasures/long-sword-tachi-signed-sanemitsu-of-bizen-osafune/ — 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
  • Genre: Metalwork
  • Cultural property designation: Important Cultural Property
  • Size: Length74.8cm:Curvature2.4cm
  • 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
  • 法量: 刃長74.8cm:反り2.4cm
  • 銘文等: 茎先棟寄りに「備前国長船住人真光」と長銘に切る

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National Treasure
Long Sword (Tachi) (太刀 銘安家)

Long Sword (Tachi)

太刀 銘安家
Metalwork · Heian, 12th centuryKyoto NM

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