Sujihiki translates as "flesh slicer", which describes its role well. Typically 240 mm to 300 mm long and 34 mm to 40 mm high, the sujihiki blade is perfect for making long cutting movements from heel to toe. A lower blade height decreases friction when cutting and keeps the fibers of the protein you are cutting as intact as possible.
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.