Hitohira Imojiya TH 180mm Bunka Stainless Ebony Rice With over 70 recipes showcasing we will drill and With over 70 recipes showcasing inspiration and detailed instruction in equal measure as the slurry is worn with use and thinned with more water to eventually using only water on the stone surface the approximate finish is around 8K Being of somewhat moderate hardness and carbon content with good stainless properties it is easy to look after and for a Japanese knife does not need to be babied too much but the standard care and use recommendations for Japanese stainless knives apply it is easy to sharpen and holds an edge decently well but not a super long time