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Title: Yoroidōshi  
Author: World Heritage Encyclopedia
Language: English
Subject: Kaiken (dagger), Wakizashi, Guntō, Ōdachi, Katana
Collection: Japanese Sword Types, Samurai Weapons and Equipment
Publisher: World Heritage Encyclopedia


Antique Edo period Japanese hirazukuri style, yoroidōshi tantō.

The yoroidōshi (鎧通し) "armor piercer"[1][2] or "mail piercer"[3] were one of the traditionally made Japanese swords () that were worn by the samurai class as a weapon in feudal Japan.


  • Description 1
  • Gallery 2
  • See also 3
  • References 4
  • External links 5


The yoroidōshi is an extra thick tantō (Japanese dagger-like sword) which appeared in the Sengoku period (late Muromachi).[4] The yoroidōshi was made for piercing armour[5] and for stabbing while grappling in close quarters. The weapon ranged in size from 20 cm to 22 cm, but some examples could be under 15 cm, with a "tapering mihaba, iori-mune, thick kasane at the bottom, and thin kasane at the top and occasionally moroha-zukuri construction".[6] The motogasane (blade thickness) at the hamachi (the notch at the beginning of the cutting edge) can be up to a half-inch thick, which is characteristic of the yoroidōshi style of tantō. The extra thickness at the spine of the blade distinguishes the yoroidōshi from a standard tantō blade.

Yoroidōshi were worn inside the belt on the back or on the right side[7] with the hilt toward the front and the edge upward. Due to being worn on the right, the blade would have been drawn using the left hand, giving rise to the alternate name of metezashi (馬手差),[8] or "horse-hand (i.e. rein-hand, i.e. left-hand) blade".


See also


  1. ^ Japan by Pierre Landy; Nagel Publishers p.68
  2. ^ Selected masterpieces of Asian art Museum of Fine Arts, Boston - 1992 p.97
  3. ^ Report of the proceedings of the Numismatic and Antiquarian Society of Philadelphia Numismatic and Antiquarian Society of Philadelphia 1891 p.28
  4. ^ , Kanzan Satō, Kodansha International, 1983 P.30The Japanese sword
  5. ^ Secrets of the samurai: a survey of the martial arts of feudal Japan Oscar Ratti, Adele Westbrook p.260
  6. ^ , Author Kōkan Nagayama, Publisher Kodansha International, 1998, ISBN 4-7700-2071-6, ISBN 978-4-7700-2071-0 P.30The connoisseur's book of Japanese swords
  7. ^ Japan by Pierre Landy; Nagel Publishers p.68
  8. ^ 1988, 国語大辞典(新装版) (Kokugo Dai Jiten, Revised Edition) (in Japanese), Tōkyō: Shogakukan

External links

  • Nihontō message board forum
  • Richard Stein's Japanese sword guide
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