This is a "family heirloom" knife, confirmed by Fujiwara Teruyasu Hamono Kogei. Knife Manufacturer: Fujiwara Teruyasu Hamono Kogei Blade Material: Aogami Super Steel ● Blade Length: Approximately 177mm (180mm) ● Overall Length: Approximately 305mm ● Blade Width: Approximately 41.7mm ● Blade Thickness: Approximately 2.5mm ● Weight: Approximately 173g ● Accessories: Box ● Handle polished Manufacturer's Regular Price: ¥74,800 This item has been sharpened by the manufacturer (Fujiwara Teruyasu Hamono Kogei). Please enjoy the sharpness as if it were new. Everything in the images is included. Please purchase only if you understand that this is a used item. Instant purchase is welcome without comments. The Gyuto (chef's knife) and "family heirloom" knife are manufactured with stainless steel and the highest grade steel (Aogami Super) in a sandwich construction, with a hammered finish on the surface. The steel (Aogami Super) is commonly referred to as Aogami (blue paper steel). It is an alloy made by adding tungsten and chromium to high-purity Shirogami (white paper steel), and is the highest grade steel developed for knives. Aogami is characterized by its toughness and wear resistance, and is less prone to chipping or dulling compared to Shirogami. Aogami Super is the name of the steel material. It is a steel (hagane) for kitchen knives manufactured by Hitachi Metals.