Pure carbon steel with minimal impurities. Proper forging and heat treatment produce blades that are sharp and easy to sharpen. Tungsten and chromium are added to improve heat treatment characteristics and wear resistance, resulting in long-lasting sharpness. A steel grade with rust resistance and easy maintenance by adding nickel and chromium.

Traditional Kasumi polished finish. Kasumi roughly translated to “mist” or “cloud” and refers to the hazy appearance of the soft steel/iron cladding, in contrast to the fine polished cutting edge. This elegant finish is very common on traditional style Japanese blades.