Shinshu forged blade is a handicraft in Shinshu-Shinano-machi, Nagano Pref. It was designated as a Traditional Craft Product by Minister of International Trade and Industry in 1982. Forging skills were introduced into this area during the warring state period in the latter half of the 16th Century, when swordsmiths came to this area and repaired weapons. The local people saw their work and learned the skills. Their forged weapons were used in many battles throughout the warring state period, and the swordsmiths made improvement in their techniques. Extremely soft steel is used as the base whereas high purity carbon steel is used for the blade, the combination of which produces appropriate hardness and persistent strength. The technique has been handed down for 450 years and is still producing excellent blades, which are wide, durable, and cuts clearly.
- Shinshu Forged Blades