Kiritsuke Gyuto is a cross between traditional kiritsuke and gyuto. The profile of the cutting edge is generally straighter and the tip is cut, similar to the kiritsuke, while the double bevel is characteristic of the gyuto. Kiritsuke Gyuto acts as a chef's knife in your kitchen and can do most of the tasks. It is usually found between 210 and 270 mm.
Aogami literally translates as: "blue steel" and therefore "Blue Super Steel" for Aogami Super. Manufactured by Hitachi Metals Ltd, this carbon steel grade has one of the highest hardness levels and is one of the most renowned in Japan. In addition to containing more carbon, chromium and tungsten than Aogami #1, it also contains molybdenum. The high carbon content results in higher hardness, but in return, it reduces the corrosion resistance and makes the steel more brittle. Chromium and molybdenum counterbalance the effect of the high carbon content by improving corrosion resistance. While tungsten greatly increases the wear resistance of the steel to make it less brittle. This makes it, objectively, a superior carbon steel on a practical level than other steels in this category.
Futana is the name of a line of Hitohira's house knives. As with all products that carry Hitohira's trademark (ひとひら (一片)), a high standard of quality is assured. Under the name of Futana you will be able to find knives of any profile made of stainless or semi-stainless steel. In addition, you will be able to find these blades with several different types of finishes; nashiji, kurouchi, damascus etc.