Nashiji is a Japanese style blade finish which looks like Japanese pear skin. It is done by hand-forge and therefore every blade has different pattern. You can see the uniqueness of Japanese culture on each one of them. It is one of our popular finishes.
Blue Paper Steel (the core steel) is basically White Paper Steel with the addition of chromium and tungsten. The blades become harder and its sharp edge lasts longer by adding chromium and tungsten. The steel is mainly used for high-end knives.