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Forging (Age-gitae, final forging)

Shingane are folded back 7 times, Munegane 9 times, Hanokane 15 times and Gawagane 12 times. By repeatedly forging after folding back the steel struck and elongated, impurities such as sulfur, excess carbon and non-metal impurities are removed, and a strong and homogeneous steel is created.