"The blade is convex on both sides in the tradition of the highly praised Japanese sword. This shape is both sharp and strong, and can still slice paper even after the 1,000 of hemp rope cuts. Using this blade form is one superb method of making an edge thick without losing of its sharpness. This is a knife of preeminent sharpness. You can enjoy its strong cutting capabilities for a long time. Even if used for rigorous cutting, the blade will not bite thanks to its convex shape. Other knives often will bite, and may nick if it is pulled out suddenly at that time. This knife scratches the plate of china. Please do not use it to cut food on the plate." The blade is ZDP-189 steel with notched thumbrest and dual thumbstuds, mirror polished blade grind. The handle is black aluminum with rayskin inlay and tip up stainless steel clip. Comes with original wooden box. Excellent condition. S/N 021.