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This poem describes a merchant of Yueh (South China) who goes to Japan to buy Katana already being called treasure swords given their artistic qualities found in the fittings and appearance. Katana is found in a poem titled 'A Poem About the Katana' by Ou-yang Hsui in Baisong. Katana is not only a Weapon, but also an Art-craftĭifferent from swords of other countries, the biggest feature of Katana is that the body of blade itself has artistic value, aside from the fittings (Koshirae).
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The Nakago has holes (Mekugi holes) to fix the body of blade to the Tsuka (handle) with pin fasteners. They feature a process of folding and forging' two types of metal, hard brittle steel and soft iron, so the Toshin (body of blade) and Nakago (core) are combined together. They also functioned as a support pillar of spiritual culture, 'the very soul of the samurai against the backdrop of the military government. Old and unbroken lines, including the Imperial family and shrines, value treasure swords (such as Amenomurakumono tsurugi) as a proof of power. Its beautiful shape has symbolic meaning as well as its use as a weapon since ancient times, and many are highly appraised as art objects.
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Craftsmen who make Katana are called 'Toko (sword craftsman),' 'Tosho (sword master)' or 'Katana kaji (swordsmith). They are classified as Katana (Tachi, Uchigatana), Wakizashi and Tanto depending on size. Katana (Samurai Sword) is a generic term for swords forged in the originally developed way in Japan.
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