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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
The word tama means 'precious', and the word hagane means 'steel'. [1] Tamahagane is used to make Japanese swords, daggers, knives, and other kinds of tools. The carbon content of the majority of analyzed Japanese swords historically lies between a mass of 0.5–0.7%; however, the range extends up to 1.5%. [2] [3]
The Ohitayama Tatara Ironworks (大板山たたら製鉄遺跡, Ōitayama tatara seitetsu iseki) was a premodern steelworks for the production of tatara steel located in the Shibuki neighborhood of the town of Hagi, Yamaguchi Prefecture in the San'yō region of Japan. The site was designated a National Historic Site of Japan in 2012. [1]
Cold Steel, Inc., is an American retailer of knives/bladed tools, training weapons, swords and other martial arts edged and blunt weapons.Founded in Ventura, California, the company is currently based in Irving, Texas, after an acquisition by GSM Outdoors in 2020. [1]
Takahashi Trading Company is a former Japanese-import home goods retail and wholesale business in the United States, and is the name of a 1912 warehouse building that once housed the business headquarters in the Potrero Hill neighborhood in San Francisco, California, U.S.. The business was active from 1945 until 2019, and had various retail ...
Tamahagane (玉鋼) is a general term for steel, not used prior to the Meiji Era, literally meaning "precious steel". Steel is smelted at Shimane facility for Japanese swords (nihontō (日本刀), commonly known as katana (刀)) by contemporary Japanese forge masters like Kihara Akira and Gassan Sadatoshi is still smelted in a tatara.
Katana are traditionally made from a specialized Japanese steel called tamahagane, [60] which is created from a traditional smelting process that results in several, layered steels with different carbon concentrations. [61] This process helps remove impurities and even out the carbon content of the steel.
Topy Industries, Ltd. (トピー工業株式会社, Topī Kōgyō Kabushiki-gaisha) is a Japanese company specializing in steel, [3] particularly automobile and industrial components. Its main products are steel products; wheels for passenger cars, buses, trucks and construction machinery; and undercarriage components for construction equipment ...