"KIYOKANE" Santoku Kitchen Knife 180mm, Aogami Super Steel, Kurouchi Double Bevel Japan SIZE: Blade Length 180mm(7inch), Whole Length 340mm(13.4inch), Weight 150g(5.3oz) Edge of Blade : Aogami Super Steel which contains high-carbon. Hardness : around HRC64 +/- 1, Cut Well! Made in Japan! Tosa) Handmade by Tosa Craftsment! Double Bevel. Available for both Right and Left Hander Kurouchi : Rough Appearance, but you can feel Tosa Craftsmen Spirits! Kurumi Wood Handle. As Aogami Super is so hard, it is hard to grind. Recommend for professionals or for those who know about knives better.