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The steel used in sword production is known as tamahagane (玉鋼:たまはがね), or "jewel steel" (tama – ball or jewel, hagane – steel). Tamahagane is produced from iron sand, a source of iron ore, and mainly used to make samurai swords, such as the katana, and some tools. Diagram of a tatara and bellows
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A map of the territories of the Sengoku daimyo around the first year of the Genki era (1570 AD). Daimyo (大名, daimyō, Japanese pronunciation: ⓘ) were powerful Japanese magnates, [1] feudal lords [2] who, from the 10th century to the early Meiji period in the middle 19th century, ruled most of Japan from their vast hereditary land holdings.
Tamahagane is made of an iron sand (satetsu) found in Shimane, Japan. There are two main types of iron sands: akame satetsu (赤目砂鉄) and masa satetsu (真砂砂鉄). Akame is lower quality, masa is better quality. The murage decides the amount of the mixing parts. Depending on the desired result, the murage mixes one or more types of sands.
The word katana first appears in Japanese in the Nihon Shoki of 720. The term is a compound of kata ("one side, one-sided") + na ("blade"), [6] [7] [8] in contrast to the double-sided tsurugi. The katana belongs to the nihontō family of swords, and is distinguished by a blade length (nagasa) of more than 2 shaku, approximately 60 cm (24 in). [9]
Blades whose length is next to a different classification type are described with a prefix 'O-' (for great) or 'Ko-' (for small), e.g. a Wakizashi with a length of 59 cm is called an O-wakizashi (almost a Katana) whereas a Katana of 61 cm is called a Ko-Katana (for small Katana; but note that a small accessory blade sometimes found in the ...
In 1976, in order to secure sword-making materials that would become increasingly difficult to obtain, the Nittoho Tatara Plant was established to produce wako (Japanese steel for blades) and tamahagane (High-quality blade steel), in Okuizumo town, Shimane Prefecture. [12] In 1977, the Nittoho Tatara Plant was revived in Yokota Town, Shimane ...
The package also includes a list of names and maps of various residences found in the province. [ 3 ] Swords of the Daimyo provides the continent map of the world presented in the original Oriental Adventures , and details a full province with a background included for one of the five most significant divisions in the world.