Detailed Spec

Brand: Hitohira ひとひら
Product Type: Natural Stone
Size: Type 30
Producing Area: Kyoto/ Japan
Mine: Atago
Recommended Usage: Kitchen Knife (Edge), Straight Razor, Chisel, Plane
Hardness (5 = Very Hard): 4.1
Grain Scale (5 = Very Fine): 4.2
Sharpening Speed (5 = Very Fast): 3
Soaking Requirement: Not required
Size: 218 x 82 x 63mm
Weight: 2909g
Revied by Naoki Tsuda
Update: September 30, 2025