During a recent nationwide survey of intangible cultural heritage, distinctive handmade high-speed steel (HSS) cutting knife craftsmanship has been identified in multiple regions.

These techniques are typically passed down through families or master-apprentice relationships and encompass unique methods for material selection, heat treatment, and blade sharpening.

In one northern region, traditional knife-making emphasizes folded forging—repeatedly hammering the steel to remove impurities while naturally forming decorative grain patterns.

In contrast, techniques in southern coastal areas focus on the formulation of quenching media, with some artisans even using plant-based extracts as additives in cooling solutions.

“Each regional technique reflects a fusion of local material resources and craft traditions,” said a researcher specializing in intangible cultural heritage. “These practices are not merely methods for making tools—they are vessels of local culture and artisanal wisdom.”

Currently, grassroots organizations have begun systematically documenting these endangered crafts and exploring ways to integrate them into modern craft education.

Experts suggest incorporating HSS knife-making into hands-on vocational training programs—not only to preserve the heritage but also to cultivate practical skills and the spirit of craftsmanship among younger generations.