展示ゾーン:源=みなもと

純度99パーセント以上の最高品質

玉鋼(たまはがね)

たたら製鉄によって生み出される、不純物がきわめて少ない鉄(けら)の中から選別されたもっとも品質の高い部分。現代の技術でも制作できない、純度99パーセント以上の最高の品質を持つ鋼です。軟らかく、伸びやすく、何度も折り返して作る刃物に向いた性質をもち、そのまま日本刀の材料となります。


Tama-hagane steel

When a batch of extremely high-purity steel forged in a tatara furnace is sorted, the steel in the batch with the very lowest level of impurities is called tama-hagane. Tama-hagane is top-quality steel with at least 99% purity, which is not possible to replicate even with modern forging technology. The steel is soft and easily-molded, making it suitable for use in the making of blades which requires repeated folding during forging. It is therefore used for creating traditional Japanese swords.