Hitohira Picked Atago Natural Stone Type 30 (No.0078) Kasumi Finish it is the only component

it is the only component we physically engage with a knife

only for Oboro

white area is especially good

knives and natural stones in huge storage

Hitohira Picked Atago Natural Stone Type 30 (No.0078) Kasumi Finish it is the only componentFinish like a mirror, very hard stone. Detailed Spec Brand: Hitohira Product Type: Natural Stone Size: Type 30 Producing Area: Kyoto Japan Mine: Atago Recommended Usage: Kitchen Knife (Edge), Straight Razor, Chisel Planes Hardness (5 = Very Hard): 4. 1 Grain Scale (5 = Very Fine): 4 Sharpening Speed (5 = Very Fast): 3. 3 Soaking Requirement: Not required Size: 205 x 79 x 36mm Weight: 1477g Reviewed by Naoki Tsuda Update: 5 30, 2026