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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 ...
A. Abe Masahiro; Abe Masayoshi; Abe Tadaaki; Akamatsu Masanori; Akamatsu Norimura; Akamatsu Mitsusuke; Akamatsu Norifusa; Akaza Naoyasu; Akechi Mitsuhide; Akita clan
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]
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
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.
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 ...
The NFL WAG life is not what it may seem. Bryce Watts Hansen, wife of former professional football free agent Chad Hansen, gave her TikTok viewers an inside look at her family's finances when her ...
The shogunate placed many fudai at strategic locations to guard the trade routes and the approaches to Edo. Also, many fudai daimyo took positions in the Edo shogunate, some rising to the position of rōjū. The fact that fudai daimyo could hold government positions, while tozama in general could not, was a main difference between the two.