Our handmade Yoshihiro Blue Steel Suminagashi knives are crafted with extraordinary skill by our master artisans. Exemplifying the most intricate techniques of forging, layering, and hammering, Aoko Blue Steel #1 with a hardness on the Rockwell scale of 64, is forged with iron to create the most elaborate of finishes. Suminagashi translates as floating ink and refers to the beautiful marbled wave like patterns that extend through the blade from the tip to the heel, unveiling a new mosaic with every sharpening. Only the most skilled of artisans can forge together these metals in such complex puzzle piece formations to fashion knives of this caliber with the highest quality, blending aesthetics and performance. Our Yoshihiro Blue Steel #1 Suminagashi knives are complimented with a traditional Japanese style handcrafted premium Ebony wood handle of the highest quality and affixed with a Water Buffalo horn bolster. This knife comes with a rare artisan crafted Saya, a protective wooden sheath made of premium Ebony wood which protects the knife and adds to its appearance when not in use. The Kiritsuke knife is a traditional Japanese all purpose chefs knife that resembles a sword. Its length allows it to cut sushi and sashimi like a Yanagi, and the wideness of the blade gives it the dexterity to do multiple jobs. The sword tip also helps balance the weight of the knife and can be used for intricate and precise knife work for excuisite service. Even the simplest of tasks are elevated with a handcrafted knife that is as beautiful as it is functional.