This series is hand-sharpened by Mr. Keiichi Fujii, a knife craftsman in Sakai City, Osaka Prefecture, and uses AUS10, a rust-resistant and wear-resistant stainless steel, as the core material. The Damascus pattern on the surface consists of 17 layers including the core material, making each knife a beautiful knife with a different pattern. The shape of the handle is Japanese-style and is made of natural rosewood, making it lighter and easier to handle than Western-style handles.