Type: KiritsukeConstruction: Hon-Warikomi / Ironclad with Blue#2 / Damascus 33 LayerMethod: Hammer ForgedBlade Length: 165 mm Blade Height: 45 mm (1.7 in)Weight: about 125 g Spine Thickness: 2.8 mm/at heelCore Edge Steel: Blue (Aogami) #2 High Carbon SteelHRC (Rockwell Hardness): 60-62Blade Type: Double-BevelFinishing: Polished finishPlace of Origin: Tosa, JapanHandle: Walnut (Kurumi) / Pakka wood FerruleHandle: Octagonal Polished Damascus is also called Suminagashi. It has an exquisite marbling texture that resembles ink flowing through the water. The Suminagashi knife symbolizes Japan and has continued to charm people since time immemorial.This beautiful Suminagashi knife is sure to create dishes capable of soothing countless hearts, like that of an ink painting. Our Japanese knives are filled with the artisans’ hearts and souls. Behold the sharpness of Japan’s Yasugi steel and the ancient blade crafting art.Blue (Aogami) #2 (Hitachi Metals Ltd.) is made by adding Chromium and Tungsten / Wolfram to White Steel #2. This results in increased toughness and the production of hard carbide molecules, which improve edge retention. Many knife users have noted that while Blue Steel #2 is very similar to White Steel #2 in terms of edge sharpness, it has slightly superior edge retention.Blue (Aogami)#2 (Hitachi Metals Ltd.) is made by adding Chromium and Tungsten / Wolfram to White Steel #2. This results in increased toughness and the production of hard carbide molecules, which improve edge retention. Many knife users have noted that while Blue Steel #2 is very similar to White Steel #2 in terms of edge sharpness, it has slightly superior edge retention.About Damascus:Polished Damascus is also called “Suminagashi.” It has an exquisite marbling texture that resembles ink flowing through the water. The Suminagashi knife symbolizes Japan and has continued to charm people since time immemorial.This beautiful Suminagashi knife is sure to create dishes capable of soothing countless hearts, like that of an ink painting. Our Japanese knives are filled with the artisans’ hearts and souls. Behold the sharpness of Japan’s Yasugi steel and the ancient blade crafting art.Cautions:After using the knife, wash it well with detergent, etc., and then wipe off the water well.(especially on the blade).Do not hit or twist the cutting edge and cut frozen foods.Use a sharpening stone to maintain the sharpness of the blade.