The Hatsukokoo Hayabusa HAP40 is a range of knives that truly blends the old with the new. Using a machine forging process that ensures the blades are precise in shape and profile the Hatsukokoro Hayabusa HAP40 is then imperiously hand sharpened to the exacting finishes to allow the blades to have an HRC of 64-65. The combination of the two techniques gives the Hatsukokoro Hayabusa HAP40 supreme edge retention as for all Japanese Knives but it also gives the knife extreme durability. This gives the Hatsukokoro Hayabusa HAP40 range a unique selling point in that it uses HAP40 Steel which is manufactured by Hitachi Metals Ltd and is one of the more superior metals that go into knife manufacturing. The knives are then clad in stainless steel to protect the core material and to allow extreme robustness to the knives, these knives can take a lot of rough treatment, but the edge will stay sharp – its comparable to European workhorse brands that are well known in the west. The knives come in a Migaki finish with a Black Buffalo bolster to complete the octagonal Wa handle finished with teak.