Le Bunka est un couteau de type tout usage qui a un profil plus droit au niveau du tranchant qu’un Santoku. Cela rend le mouvement de coupe de balancier plus difficile à effectuer. Le Bunka est toutefois parfait pour être utilisé avec la méthode « push-cut » ou « pull-cut ». Sa pointe fine apporte précision et agilité puisqu’elle passe plus facilement au travers des aliments lors de la coupe.
Aogami literally translates to "blue steel", so "super blue steel" is the translation 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 allows for greater hardness, but on the other hand, 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. Tungsten greatly increases the wear resistance of the steel, making it less brittle. The combination of all these characteristics makes Aogami Super a practically superior carbon steel compared to other steels in this category.