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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.
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]
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 Nihon Bijutsu Tōken Hozon Kyōkai (日本美術刀剣保存協会, 'The Society for Preservation of Japanese Art Swords', NBTHK) is a public interest incorporated foundation established in February 1948 to preserve and promote Japanese swords that have artistic value. They run a Japanese Sword Museum in Tokyo and have a secretariat in the ...
Tamahagane. Japanese smiths discovered, similarly to many others, that iron sand (with little to no sulfur and phosphorus) heated together with coal (carbon) made the steel they called tamahagane. This allows the sword to have the strength and the ability to hold a sharp edge, as well as to cause the sword to tend to bend rather than flex under ...
Japanese swords made in this period is classified as shintō. [86] A tantō forged by Minamoto Kiyomaro. Late Edo period. (left) Tantō mounting, Late Edo period. (right) In the late 18th century, swordsmith Suishinshi Masahide criticized that the present katana blades only emphasized decoration and had a problem with their toughness.
It is one of the few museums in Japan that specializes in Japanese swords.Works donated by sword enthusiasts are entrusted with storage and management. The old Japanese Sword Museum, located in Yoyogi 4-chome, Shibuya-ku, closed at the end of March 2017, and the new Japanese Sword Museum opened in January 2018.
Tamahagane, which is used to forge the blade of traditionally made Japanese blade nihonto. It takes about a week to build the tatara and complete the iron conversion to steel. When the process is done, the clay tub is broken and the steel bloom, known as a kera , is removed.