Blade for a Short Sword ("Kodachi"), Named “Hachiya Nagamitsu”

小太刀（名物蜂屋長光）

At a glance — Swords & Armour · Kamakura period, 13th century · held by Tokyo National Museum · designated Important Cultural Property of Japan · Osafune Nagamitsu.

Fact Sheet

Designation: Important Cultural Property (重要文化財)
Category: Swords & Armour
Period: Kamakura period, 13th century
Date: 1201–1300
Creator: Osafune Nagamitsu (長船長光、長光)
Held by: Tokyo National Museum
Location: Ueno, Tokyo
Catalogue ID: cobas-159150

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Same period: Kamakura swords & armour →
Same creator: Osafune Nagamitsu →
At this museum: All 1632 works here →

Famous Japanese swords often have names derived from their storied histories. This blade is named Hachiya Nagamitsu. The second half of the name refers to the master artisan Nagamitsu, who forged this blade in the 1200s. The first part recognizes a former owner, Hachiya, a rebellious samurai active during the civil wars of the 1500s.

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

Record & Sources

Designation: Important Cultural Property (重要文化財), Government of Japan
Catalogue ID: cobas-159150 (permanent)
Official record: Japan Search — jpsearch.go.jp/item/cobas-159150
Holder's collection: ColBase — Tokyo National Museum
Photograph: Tokyo National Museum, via ColBase — CC BY 4.0. CC BY 4.0 licence
Credit as recorded: Gift of Mr. Watanabe Seiichirō

Cite this page: “Blade for a Short Sword ("Kodachi"), Named “Hachiya Nagamitsu”（小太刀（名物蜂屋長光））.” Treasures of Japan, catalogue no. cobas-159150. Tokyo National Museum. https://treasures.yamato-kenkou.com/treasures/blade-for-a-short-sword-kodachi-named-hachiya-nagamitsu/ — entry last verified 1 November 2026.

Full record data (as published in the official catalogue record)

Category: Applied arts:Arms and armor:Blades:Tachi
Genre: Arms & Armor
Cultural property designation: Important Cultural Property
員数: 1口
分類: 刀剣
種別: 工芸:武器・武具:刀剣:太刀
銘文等: 銘長光

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