wiki-Awase

<Honyaki, Awase>

Definition: A type of knife construction in which different metals—typically hard steel and soft iron—are layered together, in contrast to single-steel knives such as honyaki.
Details: In awase knives, the cutting edge is made of high-carbon steel for sharpness, while the outer layers are made of soft iron to provide toughness and ease of sharpening. This structure reduces the risk of breaking, allows easier resharpening, and balances hardness with resilience. The soft iron portion often appears hazy after polishing, giving rise to the name kasumi (misty finish).
Comparison: Compared to honyaki knives (forged from a single piece of steel), awase knives are easier to produce, more forgiving to use, and simpler to sharpen. However, honyaki knives, though more difficult to forge, are regarded as higher-end, offering superior hardness, edge retention, and durability against warping.
Practical Use: Awase knives are the most common type of traditional Japanese kitchen knife, used widely for yanagiba, deba, and other single-bevel styles. They provide an excellent balance for professional chefs—combining performance with ease of maintenance—and are more accessible in price and handling than honyaki.

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