Shinken means '' alive blade '' it is the cutting katana. It is forged according to a special method specific to the
Japanese blades. Its manufacturing answers as much a spiritual process that technical.
The blade of the shinken must answer 2 antagonistic criteria: to present a cutting-edge very resistant, and thus
excessively hard, while keeping an enough flexible blade not to break. To build a blade having these
characteristics, the blacksmiths developed a complex process. The grade of the steel employed for the
manufacturing of a katana is determining compared to the way it is used. Truth katanas are handy forged from
carbon steel, folded steel or tamahagane steel which is the best for a '' shinken ''