Our handmade Yoshihiro Aonamiuchi Blue Steel knives are crafted with extraordinary skill by our master artisans. Aoko Blue Steel #1 with a hardness on the Rockwell scale of 64, is intricately forged with iron to create beautiful wave like patterns. It takes a very high degree of skill to create knives of exceptional performance with such exquisite beauty. Namiuchi means wave forged, and our master artisans blend aesthetics with the highest quality materials and and craftsmanship. Our Yoshihiro Aonamiuchi Blue Steel knives are complimented with a traditional Japanese style handcrafted Yew tree wooden handle affixed with a Water Buffalo horn bolster, and a protective wooden sheath called a Saya is included, which protects the knife and adds to its appearance when not in use. The Edosaki knife was made specifically to filet eel. Its blade was designed to filet from the back to the front and it has a short beveled handle to fit securely in the palm of the hand during slippery conditions. The Edosaki is incomparable for delicately filleting and bring out the sumptuous flavors of eel for exquisite service. Even the simplest of tasks are elevated with a handcrafted knife that is as beautiful as it is functional.