noun
tamahagane; traditional Japanese steel made from iron sand
High-carbon steel produced in a tatara furnace, prized for sword-making and edged tools.
日本刀は玉鋼から作られる。
Japanese swords are made from tamahagane.
玉鋼は砂鉄を原料とする伝統的な鋼だ。
Tamahagane is a traditional steel made from iron sand.