Composition of Katana

Koshirae
The kimono is the formal koshirae, which is much more complex than the shirasaya, and consists of a dozen or so parts, including kashira, menuki, tsukamaki, fuchi, tsuba, seppa, kogai, kaeritsuno, kojiri, and kurikata.
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Mune sword
Mune is the surface of the back of the Japanese sword, which is used to ward off attacks and to withstand external blows, and is thickly molded and is the ridge on the side of the blade opposite the edge of the blade, which is shaped like the ridge of a roof and is so named.
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mei katana
Mei "refers to the text carved on the stem of the sword, which generally includes the swordsman and the year of making the sword. Mei is considered an important basis in the identification of Japanese swords and has significant significance for the period of activities and history of swordsmen.
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Sageo, the rope on the katana scabbard

Sageo is a rope on Saya, which gradually evolved into an ornament as the practicality of Japanese swords disappeared. Katana and Wakizashi are both inserted into the waist, and only Tachi's Sageo (Tachino) is tied to the waist or the trunk of the armor.

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mekugi:Props used to fix the handle and nakago of katana
Mekugi is a prop similar to a pin that firmly secures the handle of the knife to the nakago, preventing it from falling out during the action. The holes in the handle and nakago are called "OYATSUBU". When the sword needs to be removed, simply pull out the mekugi and shake the nakago out of the handle.  
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Samekawa:Sticker for the handle of a Japanese sword and katana
Ray skin alias“Samegawa” is the stingray leather  on the handle of the katana, and in the early days of China, large quantities of stingray skins  were imported from the South Seas, and were called "鲛 skin" (in ancient Chinese, "鲛" means shark) or pearl fish skin.
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