The yellow 4000 grit sharpening stone is an extra-fine stone, designed for professional or home use. It is user friendly for anybody learning how to sharpen a blade. Its smooth surface will bring the edge to an extra level of sharpeness, while adding a polishing finition.
The stone is fired at a high temperature with a mixture of fine #4000 abrasives and a clay binder.
Note that this stone is directly imported from Japan.
All knives from Masakage are handmade by master blacksmiths of Takefu Knife Village and are hand sharpened by one of Japan's best knife sharpeners, Takayuki Shibata san. When these knives come out of their box, they have an amazing sharpness and will stay sharp for an extremely long time due to Shibata san's masterful technique.