Single-Edge Structures of Honyaki and Kasumi
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Pure precision or practical harmony?
In the world of Japanese single-edged knives, two traditions stand apart: Honyaki and Kasumi (Awase).
Honyaki knives, forged from a single piece of high-carbon steel, are the pinnacle of Japanese craftsmanship. They embody purity and precision, delivering razor-thin edges and a cutting feel that reflects the highest level of mastery. Yet this perfection demands skill—both from the blacksmith who forges them and the chef who sharpens and handles them with care.
Kasumi knives, in contrast, are forged by laminating a hard steel core with softer iron. This construction creates a practical balance—sharpness with durability, precision with forgiveness. Easier to sharpen and more approachable for daily use, Kasumi knives carry both tradition and accessibility, though their performance depends heavily on the quality of the forge.
Together, Honyaki and Kasumi reflect two different philosophies in Japanese knife-making: one pursuing uncompromising purity, the other blending practicality with tradition. Choosing between them is not simply about sharpness—it is about the relationship you wish to build with your knife.
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Our Story
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Tradition of Sakai, in Your Hands
"Where can I find a truly great knife?"
We started KIREAJI to answer that question. While the number of skilled craftsmen is declining in Japan, many people overseas are seeking authentic blades. With that in mind, we carefully deliver each knife—bridging tradition and kitchens around the world. -